MOTHERBOARDS · YOUR NEXT FACE-OFF

ASUS Pro WS B850M-ACE SE vs MSI PRO B850M-A WIFI

Real specs. Clear sources.Exact models · UK & US buying links

Compared products

YOUR FIRST CHOICE

ASUS Pro WS B850M-ACE SE

Pro WS B850M-ACE SE · AM5 · Micro-ATX · ASUS UK specification

Full product profile Official image

Exact model & source notes

A micro-ATX AM5 workstation motherboard with AMD B850 that also supports AMD EPYC 4005: four DDR5 slots with ECC support, two PCIe 5.0 x4 M.2 slots plus MCIO and U.2 connectors, 10 Gb and 2.5 Gb Ethernet, and an onboard AST2600 BMC with a dedicated management port.

Specifications checked 27 Sept 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

WHAT DIFFERS

7 verified differences, led by Memory type, slots and limit, storage interfaces and expansion slots and electrical links. Compared in full below. Not a rating.

See the 7 verified differences

THE CONTENDER

MSI PRO B850M-A WIFI

AM5 · DDR5 · Micro-ATX · Wi-Fi 7 · MSI global specification

Full product profile Official image

Exact model & source notes

A Micro-ATX AM5 board on AMD B850 with four DDR5 slots (up to 256 GB), a PCIe 5.0 x16 graphics slot, two CPU-connected M.2 slots (one PCIe 5.0 x4), Realtek 5 Gb Ethernet and 160 MHz Wi-Fi 7.

Specifications checked 26 Sept 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

ASUS Pro WS B850M-ACE SE UK & US retailers

UK & US price history: no verified listing yet

MSI PRO B850M-A WIFI UK & US retailers

UK & US price history: no verified listing yet

Search links open retailer results, not a matched listing; eBay listings are checked daily. As an Amazon Associate I earn from qualifying purchases. As an eBay Partner, we may be compensated if you make a purchase.

THE DIFFERENCES, MADE VISIBLE

Visual facts

Differences first. Select a topic for its graphic, sources and conditions.

How to read this comparison

Manufacturer facts for the exact models shown. Not a quality rating or a test result.
“Different” means the known values differ, not that one is better.
Missing or conflicting evidence is marked and never counts as a difference. Source chips hold each fact’s sources and conditions.

SPECIFICATIONS SIDE BY SIDE8 topics

SELECTED TOPIC

01 / 08

Memory type, slots and limit

Check the exact configuration and source conditions for your use.

ASUS Pro WS B850M-ACE SE4 DDR5 DIMM slots; dual channel; up to 256 GB; up to DDR5-8000+ (OC) with Ryzen; up to DDR5-5600 with AMD EPYC 4005; AMD EXPO; ECC and non-ECC unbuffered

Manufacturer specification · Supported capacity, module population and speeds depend on the exact CPU, installed BIOS and validated memory kit. Profile support does not guarantee an overclock.

Source 1

MSI PRO B850M-A WIFI4 DDR5 DIMM slots; dual channel; up to 256 GB; up to DDR5-8200+ (OC); JEDEC 4800–5600 MT/s; AMD EXPO; non-ECC unbuffered; CUDIMM (clock-driver bypass mode only)

Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds.

Source 1

Explore the full specifications

Plan the complete platform. Check the exact CPU-support list, required BIOS and memory validation before buying. PCIe generations and lane allocations can change with the processor. A socket match or slot count is not a guarantee that every component works together at its highest advertised setting.

WHAT CHANGES BETWEEN THEM?

Key differences

Full specifications ↓

7 verified differences, most decision-relevant first. All are also drawn in Visual facts above. Missing information stays separate.

Memory type, slots and limit

In Visual facts

ASUS Pro WS B850M-ACE SE4 DDR5 DIMM slots; dual channel; up to 256 GB; up to DDR5-8000+ (OC) with Ryzen; up to DDR5-5600 with AMD EPYC 4005; AMD EXPO; ECC and non-ECC unbuffered

MSI PRO B850M-A WIFI4 DDR5 DIMM slots; dual channel; up to 256 GB; up to DDR5-8200+ (OC); JEDEC 4800–5600 MT/s; AMD EXPO; non-ECC unbuffered; CUDIMM (clock-driver bypass mode only)

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Supported capacity, module population and speeds depend on the exact CPU, installed BIOS and validated memory kit. Profile support does not guarantee an overclock.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds.

MSI PRO B850M-A WIFI — official product specifications

Check the exact configuration and source conditions for your use.

Storage interfaces

In Visual facts

ASUS Pro WS B850M-ACE SE2 × M.2 PCIe 5.0 x4; 1 × MCIO connector (PCIe 5.0 x4); 1 × U.2 connector (PCIe 3.0 x4 via SFF-8643 cable); 4 × SATA 6 Gb/s

MSI PRO B850M-A WIFI1 × M.2 PCIe 5.0 x4; 1 × M.2 PCIe 4.0 x4; 4 × SATA 6 Gb/s

Sources

ASUS Pro WS B850M-ACE SE

M.2_1, M.2_2 (both 2280) and MCIO are listed under the Ryzen/EPYC processor; U.2 and SATA under the B850 chipset. · Manufacturer specification · Using the MCIO connector disables M.2_2. Enabling U.2 in BIOS disables the SATA ports. The SFF-8643 U.2 cable is purchased separately. With Ryzen 8000, M.2_1 runs PCIe 4.0 x4, M.2_2 and MCIO PCIe 4.0 x4/x2.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

M.2_1, M.2_2 connect to the CPU. · Manufacturer specification · Check the manual for M.2 SSD heatsink restrictions.

MSI PRO B850M-A WIFI — official product specifications

Check the exact configuration and source conditions for your use.

Expansion slots and electrical links

In Visual facts

ASUS Pro WS B850M-ACE SE1 × PCIe 5.0 x16; 1 × PCIe 4.0 x16 (x4 mode)

MSI PRO B850M-A WIFI2 × x16-length, 1 × x1-length: PCI_E1 PCIe 5.0 x16 (CPU); PCI_E2 PCIe 3.0 x1 (chipset); PCI_E3 PCIe 4.0 x4 (chipset)

Sources

ASUS Pro WS B850M-ACE SE

The PCIe 5.0 x16 slot is listed under the Ryzen/EPYC processor; the x4-mode slot under the B850 chipset. · Manufacturer specification · With Ryzen 8000 the first slot runs PCIe 4.0 x8/x4. See ASUS's PCIe bifurcation table.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

Manufacturer specification · Electrical link widths from MSI's specification, not a guarantee of installed-system performance.

MSI PRO B850M-A WIFI — official product specifications

Check the exact configuration and source conditions for your use.

Network interfaces

In Visual facts

ASUS Pro WS B850M-ACE SERealtek 10 Gb Ethernet; Intel 2.5 Gb Ethernet; Realtek 1 Gb dedicated BMC/IPMI management LAN

MSI PRO B850M-A WIFIRealtek 8126VB 5G LAN; Wi-Fi 7 (160 MHz channels, up to 2.9 Gb/s); Bluetooth 5.4

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · The 1 Gb port is for BMC and IPMI connections only and does not support internet access. ASUS lists no wireless module for this board.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

Manufacturer specification · MSI says Wi-Fi 7 and its Bluetooth version need Windows 11 24H2 and that the Bluetooth version depends on the Wi-Fi chipset vendor; 6 GHz use depends on national rules. Link capabilities are not measured throughput.

MSI PRO B850M-A WIFI — official product specifications

Check the exact configuration and source conditions for your use.

Audio hardware

In Visual facts

ASUS Pro WS B850M-ACE SERealtek 7.1-channel HD audio codec (model not stated); up to 24-bit/192 kHz playback

MSI PRO B850M-A WIFIRealtek ALC897; 7.1-Channel High Definition Audio

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · ASUS says the audio codec is suspended when an EPYC 4005 processor is installed. A codec description is not an independent sound-quality measurement.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

Manufacturer specification · Manufacturer hardware description, not a measured audio-quality result.

MSI PRO B850M-A WIFI — official product specifications

Check the exact configuration and source conditions for your use.

Diagnostic indicators

In Visual facts

ASUS Pro WS B850M-ACE SEQ-Code; Q-LED (CPU, DRAM, VGA, boot device); BMC, message and location LEDs

MSI PRO B850M-A WIFI4 × EZ Debug LED; 1 × EZ Memory Detection LED

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

Manufacturer specification

MSI PRO B850M-A WIFI — official product specifications

Check the exact configuration and source conditions for your use.

Show 1 more verified difference

Fan and pump headers

In Visual facts

ASUS Pro WS B850M-ACE SE1 CPU; 1 CPU OPT; 3 chassis fan headers (all 4-pin); 1 W_PUMP+

MSI PRO B850M-A WIFI1 CPU; 1 pump/system combo; 3 system fan

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Header counts do not specify electrical current limits.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

Manufacturer specification · Header counts do not specify electrical current limits.

MSI PRO B850M-A WIFI — official product specifications

Check the exact configuration and source conditions for your use.

Configuration & compatibility details (1)

CPU support / BIOS source

ASUS Pro WS B850M-ACE SEAMD Ryzen 9000 / 8000 / 7000 Series; AMD EPYC 4005 Series

MSI PRO B850M-A WIFIAMD Ryzen 9000 / 8000 / 7000 Series Desktop Processors

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Check ASUS's exact CPU support list and its required BIOS; family support does not confirm the firmware installed on a retail board. ASUS says the audio codec is suspended with an EPYC CPU.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

Manufacturer specification · Check MSI's CPU support list and the BIOS version it requires. Family support does not confirm the firmware installed on a retail board.

MSI PRO B850M-A WIFI — official product specifications

These descriptions or measurements differ. Wording alone does not establish a different capability; check the exact configuration.

Missing or non-comparable evidence (28)

Firmware storage

ASUS Pro WS B850M-ACE SE512 Mb Flash ROM, UEFI AMI BIOS (text-based)

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Flash-ROM capacity does not identify the BIOS version installed on a retail board.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

CUDIMM operating mode

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFIClock-driver bypass mode only

Sources

ASUS Pro WS B850M-ACE SE

No source recorded for this side.

MSI PRO B850M-A WIFI

Manufacturer specification · CPU- and BIOS-dependent; check MSI's memory compatibility list.

MSI PRO B850M-A WIFI — official product specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Integrated-graphics display connections

ASUS Pro WS B850M-ACE SEDisplayPort 1.4: up to 8K 30 Hz; HDMI 2.1: 4K 60 Hz; 1 USB 10 Gb/s Type-C with DisplayPort output; plus 1 VGA from the AST2600 BMC

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · The DisplayPort, HDMI and USB-C outputs require a processor with integrated graphics; see AMD CPU specifications. The VGA output comes from the AST2600 BMC. Not measured display performance.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Wired Ethernet

ASUS Pro WS B850M-ACE SERealtek 10 Gb Ethernet + Intel 2.5 Gb Ethernet (plus a 1 Gb BMC-only management port)

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Link-rate capability; real throughput depends on the connected network, cabling and workload. The Realtek 1 Gb port is for BMC/IPMI only. ASUS also lists ASUS LANGuard.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Expansion/storage lane sharing

ASUS Pro WS B850M-ACE SEM.2_2 is disabled when the MCIO connector is operating; enabling U.2 in BIOS disables the SATA ports

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Read the simultaneous-use restrictions rather than assuming every storage connector works together.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Internal USB connections

ASUS Pro WS B850M-ACE SE1 × USB 20 Gb/s (Type-C); 2 × USB 5 Gb/s (1 header); 4 × USB 2.0 (2 headers); 1 × onboard USB 2.0 Type-A port for BIOS FlashBack

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Internal headers need compatible case ports or accessories. ASUS lists USB Type-C power delivery output of max. 5 V/3 A.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Processor-dependent display outputs

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFI1 × HDMI; HDMI 2.1, maximum resolution of 4K 60Hz; 1 × DisplayPort; DisplayPort 1.4, maximum resolution of 4K 60Hz

Sources

ASUS Pro WS B850M-ACE SE

No source recorded for this side.

MSI PRO B850M-A WIFI

Manufacturer specification · Requires a processor with integrated graphics; supported modes depend on the CPU.

MSI PRO B850M-A WIFI — official product specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Board and SSD cooling

ASUS Pro WS B850M-ACE SEM.2 heatsink; aluminum heatsink design

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Manufacturer cooling design, not measured temperatures. ASUS's specification lists an M.2 heatsink without stating how many M.2 heatsinks there are or which of the two M.2 slots they cover. Its Q-Design list names M.2 Q-Latch for the SSD and no M.2 Q-Release heatsink switch.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Processor-dependent link widths

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFIPCI_E1: PCIe 5.0 x16 (Ryzen 9000/7000), PCIe 4.0 x8 (Ryzen 8700/8600/8400), PCIe 4.0 x4 (Ryzen 8500/8300); M.2_1: PCIe 5.0 x4 (Ryzen 9000/7000), PCIe 4.0 x4 (Ryzen 8000); M.2_2: PCIe 4.0 x4, PCIe 4.0 x2 (Ryzen 8500/8300)

Sources

ASUS Pro WS B850M-ACE SE

No source recorded for this side.

MSI PRO B850M-A WIFI

Link widths MSI lists per processor family for the named slot. · Manufacturer specification

MSI PRO B850M-A WIFI — official product specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Memory population OC limits

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFIRyzen 9000: 1DPC 1R 8200+; 1DPC 2R 6400+; 2DPC 1R 6400+; 2DPC 2R 6000+ MT/s

Sources

ASUS Pro WS B850M-ACE SE

No source recorded for this side.

MSI PRO B850M-A WIFI

Manufacturer specification · Manufacturer OC ceilings, not guaranteed stable speed or measured performance; CPU, BIOS and memory population matter.

MSI PRO B850M-A WIFI — official product specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Listed memory overclocking profiles

ASUS Pro WS B850M-ACE SERyzen 9000, 8000, 7000: up to 8000+ MT/s (OC); EPYC 4005: up to 5600 MT/s

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · These are manufacturer-listed configurations, not guaranteed stock transfer rates or tested performance. CPU family and DIMM layout remain material.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

NVMe RAID modes

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFIRAID 0/1

Sources

ASUS Pro WS B850M-ACE SE

ASUS lists AMD RAIDXpert2 levels per CPU family (Ryzen 9000: 0/1/5/10; 8000: 0/1; 7000: 0/1/10) without stating which apply to NVMe versus SATA devices, and gives no RAID levels for EPYC 4005. · Manufacturer specification

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

Manufacturer specification

MSI PRO B850M-A WIFI — official product specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Listed operating systems

ASUS Pro WS B850M-ACE SEWindows 11; Windows 10 64-bit (with AMD Ryzen processors)

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · ASUS lists these operating systems for Ryzen desktop processors; individual features and drivers can have newer requirements.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Primary PCIe link

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFIPCI_E1: CPU PCIe 5.0 up to x16

Sources

ASUS Pro WS B850M-ACE SE

No source recorded for this side.

MSI PRO B850M-A WIFI

Manufacturer specification

MSI PRO B850M-A WIFI — official product specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Motherboard power connections

ASUS Pro WS B850M-ACE SE1 × 24-pin Main Power connector; 1 × 8-pin +12V CPU Power connector; 1 × 4-pin +12V CPU Power connector

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Check the complete connector list and the PSU cable type.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Advertised voltage regulation

ASUS Pro WS B850M-ACE SE8 + 2 + 1 power stages (80A each)

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Manufacturer power-stage ratings with DIGI+ VRM (DrMOS); not a measured VRM temperature or overclocking result.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)ASUS Pro WS B850M-ACE SE — exact-model product and gallery (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Rear connections

ASUS Pro WS B850M-ACE SE5 × USB 10 Gb/s (3 Type-A + 2 Type-C, one with DisplayPort output); 2 × USB 2.0 (Type-A); 1 × DisplayPort; 1 × VGA; 1 × HDMI; 1 × Realtek 10 Gb Ethernet; 1 × Intel 2.5 Gb Ethernet; 1 × Realtek 1 Gb management LAN (AST2600); 2 × audio jacks; Clear CMOS button

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Connector count and listed modes describe the rear panel. The VGA port is driven by the AST2600 BMC; the other video outputs need a CPU with integrated graphics.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Specification market

ASUS Pro WS B850M-ACE SEASUS UK documentation

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · UK and US buying links are searches, not proof of stock, bundles or warranty. Confirm the exact model and part identifier with the retailer.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Remote management

ASUS Pro WS B850M-ACE SEOnboard AST2600 BMC with dedicated 1 Gb IPMI LAN and VGA; ASUS Control Center Express (ACC Express) with activation key card; SPI TPM header

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Out-of-band management through the BMC depends on configuration and network setup; ACC Express features depend on licensing and the operating system.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Lighting headers

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFI3 addressable V2 (ARGB Gen2) RGB headers; 1 RGB header

Sources

ASUS Pro WS B850M-ACE SE

No source recorded for this side.

MSI PRO B850M-A WIFI

Manufacturer specification · Addressable and analogue RGB connectors are different; check voltage before connecting lighting. The manual rates the 12 V JRGB connector at 3 A for up to 2 m of 5050 RGB strip, and each 5 V JARGB_V2 connector at 3 A for up to 240 individually addressable LEDs.

MSI PRO B850M-A WIFI (shared PRO B850M-A WIFI / PRO B850M-A guide) — official motherboard user guide (PDF)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

SATA RAID modes

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFIRAID 0/1/10

Sources

ASUS Pro WS B850M-ACE SE

ASUS lists AMD RAIDXpert2 levels per CPU family (Ryzen 9000: 0/1/5/10; 8000: 0/1; 7000: 0/1/10) without stating which apply to SATA versus NVMe devices, and gives no RAID levels for EPYC 4005. · Manufacturer specification

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

Manufacturer specification

MSI PRO B850M-A WIFI — official product specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

M.2 drive installation aids

ASUS Pro WS B850M-ACE SEM.2 Q-Latch

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · Installation feature only; ASUS does not say which M.2 slots use it, and it is not a cooling measurement.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Front USB header capacity

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFI4 × USB 2.0; 2 × USB 5Gbps Type-A; 1 × USB 10Gbps Type-C

Sources

ASUS Pro WS B850M-ACE SE

No source recorded for this side.

MSI PRO B850M-A WIFI

Manufacturer specification · Requires compatible case ports and wiring; not rear-panel sockets.

MSI PRO B850M-A WIFI — official product specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Rear USB ports

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFI3 × USB 5Gbps Type-A; 3 × USB 10Gbps Type-A; 2 × USB 10Gbps Type-C

Sources

ASUS Pro WS B850M-ACE SE

No source recorded for this side.

MSI PRO B850M-A WIFI

Manufacturer specification

MSI PRO B850M-A WIFI — official product specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Rear USB4 support

ASUS Pro WS B850M-ACE SENo

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · ASUS's complete rear USB list (7 ports) has no USB4 port. The board has a Thunderbolt (USB4) header for a compatible add-in card.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Thunderbolt (USB4) add-in card header

ASUS Pro WS B850M-ACE SEYes

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

Manufacturer specification · A header for a compatible Thunderbolt/USB4 add-in card; no USB4 port is built into the rear panel.

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Included Wi-Fi

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFINot verified

Sources

ASUS Pro WS B850M-ACE SE

The inspected specification lists Ethernet but does not establish an included Wi-Fi module. No capability or absence has been inferred. · Manufacturer specification

ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)

MSI PRO B850M-A WIFI

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Board dimensions

ASUS Pro WS B850M-ACE SENot verified

MSI PRO B850M-A WIFI243.84 × 243.84 mm

Sources

ASUS Pro WS B850M-ACE SE

No source recorded for this side.

MSI PRO B850M-A WIFI

Manufacturer specification · Manufacturer board dimensions; case mounting and connector clearance still need checking.

MSI PRO B850M-A WIFI — official product specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

9 shared fields have the same recorded value.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

ASUS Pro WS B850M-ACE SE

What it brings

Out-of-band management through an onboard AST2600 BMC with its own 1 Gb IPMI port and VGA output, plus ASUS Control Center Express and an SPI TPM header.
Manufacturer source
Realtek 10 Gb and Intel 2.5 Gb Ethernet, two PCIe 5.0 x4 M.2 slots, a PCIe 5.0 x4 MCIO connector and a U.2 connector (PCIe 3.0 x4).
Manufacturer source
AMD EPYC 4005 support with ECC or non-ECC unbuffered DDR5, a Q-Code display, 24/7-reliability design and a front 20 Gb/s USB-C connector.
Manufacturer source

What to check

Using the MCIO connector disables M.2_2, enabling U.2 disables the SATA ports, and the U.2 cable is sold separately.
Manufacturer source
No Wi-Fi module is listed, the rear panel has seven USB ports with no USB4, and the audio codec is suspended when an EPYC CPU is installed.
Manufacturer source

MSI PRO B850M-A WIFI

What it brings

Four DDR5 slots and a PCIe 5.0 x16 graphics slot on a 243.84 mm square Micro-ATX board.
Manufacturer source
HDMI 2.1 and DisplayPort 1.4 outputs for processors with integrated graphics.
Manufacturer source
5 Gb Ethernet, rear Flash BIOS and Clear CMOS buttons, and SATA RAID 0/1/10 plus NVMe RAID 0/1.
Manufacturer source

What to check

Only two M.2 slots, and the second is PCIe 4.0 x4 (x2 with Ryzen 8500/8300).
Manufacturer source
Wi-Fi 7 is rated at 160 MHz channels and up to 2.9 Gb/s; audio is the Realtek ALC897 codec.
Manufacturer source
No rear 20 Gb/s USB-C; the rear panel's fastest ports are 10 Gb/s.
Manufacturer source

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Full specifications

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Differences only

45 of 45 specifications Sources in each row

Source-backed specifications for ASUS Pro WS B850M-ACE SE and MSI PRO B850M-A WIFI
Specification	ASUS Pro WS B850M-ACE SE	MSI PRO B850M-A WIFI

CPU socket Sources ASUS Pro WS B850M-ACE SE Manufacturer specification ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	AM5	AM5
Chipset Sources ASUS Pro WS B850M-ACE SE Manufacturer specification ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	AMD B850	AMD B850
Form factor Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Check case mounting positions and connector clearance. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	Micro-ATX; 244 × 244 mm	Micro-ATX; 243.84 × 243.84 mm
CPU support / BIOS sourceDifferent Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Check ASUS's exact CPU support list and its required BIOS; family support does not confirm the firmware installed on a retail board. ASUS says the audio codec is suspended with an EPYC CPU. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification · Check MSI's CPU support list and the BIOS version it requires. Family support does not confirm the firmware installed on a retail board. MSI PRO B850M-A WIFI — official product specifications	AMD Ryzen 9000 / 8000 / 7000 Series; AMD EPYC 4005 Series	AMD Ryzen 9000 / 8000 / 7000 Series Desktop Processors
Firmware storage Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Flash-ROM capacity does not identify the BIOS version installed on a retail board. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	512 Mb Flash ROM, UEFI AMI BIOS (text-based)	Not provided
Listed operating systems Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · ASUS lists these operating systems for Ryzen desktop processors; individual features and drivers can have newer requirements. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	Windows 11; Windows 10 64-bit (with AMD Ryzen processors)	Not provided
Flash BIOS button Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · An onboard (internal) ASUS BIOS FlashBack button with a dedicated onboard USB 2.0 port, not a rear-panel button. Use the exact model firmware and follow ASUS's instructions. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	Yes	Yes
Advertised voltage regulation Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Manufacturer power-stage ratings with DIGI+ VRM (DrMOS); not a measured VRM temperature or overclocking result. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK)ASUS Pro WS B850M-ACE SE — exact-model product and gallery (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	8 + 2 + 1 power stages (80A each)	Not provided
Board dimensions Sources ASUS Pro WS B850M-ACE SE No source recorded. MSI PRO B850M-A WIFI Manufacturer specification · Manufacturer board dimensions; case mounting and connector clearance still need checking. MSI PRO B850M-A WIFI — official product specifications	Not provided	243.84 × 243.84 mm

Memory type, slots and limitDifferent Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Supported capacity, module population and speeds depend on the exact CPU, installed BIOS and validated memory kit. Profile support does not guarantee an overclock. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds. MSI PRO B850M-A WIFI — official product specifications	4 DDR5 DIMM slots; dual channel; up to 256 GB; up to DDR5-8000+ (OC) with Ryzen; up to DDR5-5600 with AMD EPYC 4005; AMD EXPO; ECC and non-ECC unbuffered	4 DDR5 DIMM slots; dual channel; up to 256 GB; up to DDR5-8200+ (OC); JEDEC 4800–5600 MT/s; AMD EXPO; non-ECC unbuffered; CUDIMM (clock-driver bypass mode only)
Maximum listed memory Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Manufacturer capacity ceiling; check CPU support, BIOS and the validated DIMM population. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification · Manufacturer capacity ceiling; CPU, BIOS and module validation apply. MSI PRO B850M-A WIFI — official product specifications	256 GB	256 GB
DIMM slots Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Physical DDR5 module positions; this count is not a guarantee of capacity or profile speed. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification · Physical positions for DDR5 modules, not a capacity or speed guarantee. MSI PRO B850M-A WIFI — official product specifications	4	4
Listed memory overclocking profiles Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · These are manufacturer-listed configurations, not guaranteed stock transfer rates or tested performance. CPU family and DIMM layout remain material. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	Ryzen 9000, 8000, 7000: up to 8000+ MT/s (OC); EPYC 4005: up to 5600 MT/s	Not provided
Memory population OC limits Sources ASUS Pro WS B850M-ACE SE No source recorded. MSI PRO B850M-A WIFI Manufacturer specification · Manufacturer OC ceilings, not guaranteed stable speed or measured performance; CPU, BIOS and memory population matter. MSI PRO B850M-A WIFI — official product specifications	Not provided	Ryzen 9000: 1DPC 1R 8200+; 1DPC 2R 6400+; 2DPC 1R 6400+; 2DPC 2R 6000+ MT/s
CUDIMM operating mode Sources ASUS Pro WS B850M-ACE SE No source recorded. MSI PRO B850M-A WIFI Manufacturer specification · CPU- and BIOS-dependent; check MSI's memory compatibility list. MSI PRO B850M-A WIFI — official product specifications	Not provided	Clock-driver bypass mode only

Storage interfacesDifferent Sources ASUS Pro WS B850M-ACE SE M.2_1, M.2_2 (both 2280) and MCIO are listed under the Ryzen/EPYC processor; U.2 and SATA under the B850 chipset. · Manufacturer specification · Using the MCIO connector disables M.2_2. Enabling U.2 in BIOS disables the SATA ports. The SFF-8643 U.2 cable is purchased separately. With Ryzen 8000, M.2_1 runs PCIe 4.0 x4, M.2_2 and MCIO PCIe 4.0 x4/x2. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI M.2_1, M.2_2 connect to the CPU. · Manufacturer specification · Check the manual for M.2 SSD heatsink restrictions. MSI PRO B850M-A WIFI — official product specifications	2 × M.2 PCIe 5.0 x4; 1 × MCIO connector (PCIe 5.0 x4); 1 × U.2 connector (PCIe 3.0 x4 via SFF-8643 cable); 4 × SATA 6 Gb/s	1 × M.2 PCIe 5.0 x4; 1 × M.2 PCIe 4.0 x4; 4 × SATA 6 Gb/s
M.2 storage positions Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Two onboard M.2 slots; M.2_2 is disabled when the separate MCIO connector is operating. U.2 and MCIO connectors are additional non-M.2 storage links. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	2	2
SATA storage ports Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · SATA 6 Gb/s. Enabling the U.2 connector in BIOS disables the SATA ports. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	4	4
SATA RAID modes Sources ASUS Pro WS B850M-ACE SE ASUS lists AMD RAIDXpert2 levels per CPU family (Ryzen 9000: 0/1/5/10; 8000: 0/1; 7000: 0/1/10) without stating which apply to SATA versus NVMe devices, and gives no RAID levels for EPYC 4005. · Manufacturer specification ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	Not listed by the manufacturer	RAID 0/1/10
NVMe RAID modes Sources ASUS Pro WS B850M-ACE SE ASUS lists AMD RAIDXpert2 levels per CPU family (Ryzen 9000: 0/1/5/10; 8000: 0/1; 7000: 0/1/10) without stating which apply to NVMe versus SATA devices, and gives no RAID levels for EPYC 4005. · Manufacturer specification ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	Not listed by the manufacturer	RAID 0/1
M.2 drive installation aids Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Installation feature only; ASUS does not say which M.2 slots use it, and it is not a cooling measurement. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	M.2 Q-Latch	Not provided

Expansion slots and electrical linksDifferent Sources ASUS Pro WS B850M-ACE SE The PCIe 5.0 x16 slot is listed under the Ryzen/EPYC processor; the x4-mode slot under the B850 chipset. · Manufacturer specification · With Ryzen 8000 the first slot runs PCIe 4.0 x8/x4. See ASUS's PCIe bifurcation table. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification · Electrical link widths from MSI's specification, not a guarantee of installed-system performance. MSI PRO B850M-A WIFI — official product specifications	1 × PCIe 5.0 x16; 1 × PCIe 4.0 x16 (x4 mode)	2 × x16-length, 1 × x1-length: PCI_E1 PCIe 5.0 x16 (CPU); PCI_E2 PCIe 3.0 x1 (chipset); PCI_E3 PCIe 4.0 x4 (chipset)
Expansion/storage lane sharing Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Read the simultaneous-use restrictions rather than assuming every storage connector works together. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	M.2_2 is disabled when the MCIO connector is operating; enabling U.2 in BIOS disables the SATA ports	Not provided
Primary PCIe link Sources ASUS Pro WS B850M-ACE SE No source recorded. MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	Not provided	PCI_E1: CPU PCIe 5.0 up to x16
Processor-dependent link widths Sources ASUS Pro WS B850M-ACE SE No source recorded. MSI PRO B850M-A WIFI Link widths MSI lists per processor family for the named slot. · Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	Not provided	PCI_E1: PCIe 5.0 x16 (Ryzen 9000/7000), PCIe 4.0 x8 (Ryzen 8700/8600/8400), PCIe 4.0 x4 (Ryzen 8500/8300); M.2_1: PCIe 5.0 x4 (Ryzen 9000/7000), PCIe 4.0 x4 (Ryzen 8000); M.2_2: PCIe 4.0 x4, PCIe 4.0 x2 (Ryzen 8500/8300)

Rear connections Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Connector count and listed modes describe the rear panel. The VGA port is driven by the AST2600 BMC; the other video outputs need a CPU with integrated graphics. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	5 × USB 10 Gb/s (3 Type-A + 2 Type-C, one with DisplayPort output); 2 × USB 2.0 (Type-A); 1 × DisplayPort; 1 × VGA; 1 × HDMI; 1 × Realtek 10 Gb Ethernet; 1 × Intel 2.5 Gb Ethernet; 1 × Realtek 1 Gb management LAN (AST2600); 2 × audio jacks; Clear CMOS button	Not provided
Internal USB connections Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Internal headers need compatible case ports or accessories. ASUS lists USB Type-C power delivery output of max. 5 V/3 A. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	1 × USB 20 Gb/s (Type-C); 2 × USB 5 Gb/s (1 header); 4 × USB 2.0 (2 headers); 1 × onboard USB 2.0 Type-A port for BIOS FlashBack	Not provided
Integrated-graphics display connections Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · The DisplayPort, HDMI and USB-C outputs require a processor with integrated graphics; see AMD CPU specifications. The VGA output comes from the AST2600 BMC. Not measured display performance. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	DisplayPort 1.4: up to 8K 30 Hz; HDMI 2.1: 4K 60 Hz; 1 USB 10 Gb/s Type-C with DisplayPort output; plus 1 VGA from the AST2600 BMC	Not provided
Audio hardwareDifferent Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · ASUS says the audio codec is suspended when an EPYC 4005 processor is installed. A codec description is not an independent sound-quality measurement. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification · Manufacturer hardware description, not a measured audio-quality result. MSI PRO B850M-A WIFI — official product specifications	Realtek 7.1-channel HD audio codec (model not stated); up to 24-bit/192 kHz playback	Realtek ALC897; 7.1-Channel High Definition Audio
Rear USB4 support Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · ASUS's complete rear USB list (7 ports) has no USB4 port. The board has a Thunderbolt (USB4) header for a compatible add-in card. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	No	Not provided
Thunderbolt (USB4) add-in card header Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · A header for a compatible Thunderbolt/USB4 add-in card; no USB4 port is built into the rear panel. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	Yes	Not provided
Processor-dependent display outputs Sources ASUS Pro WS B850M-ACE SE No source recorded. MSI PRO B850M-A WIFI Manufacturer specification · Requires a processor with integrated graphics; supported modes depend on the CPU. MSI PRO B850M-A WIFI — official product specifications	Not provided	1 × HDMI; HDMI 2.1, maximum resolution of 4K 60Hz; 1 × DisplayPort; DisplayPort 1.4, maximum resolution of 4K 60Hz
Rear USB ports Sources ASUS Pro WS B850M-ACE SE No source recorded. MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	Not provided	3 × USB 5Gbps Type-A; 3 × USB 10Gbps Type-A; 2 × USB 10Gbps Type-C
Front USB header capacity Sources ASUS Pro WS B850M-ACE SE No source recorded. MSI PRO B850M-A WIFI Manufacturer specification · Requires compatible case ports and wiring; not rear-panel sockets. MSI PRO B850M-A WIFI — official product specifications	Not provided	4 × USB 2.0; 2 × USB 5Gbps Type-A; 1 × USB 10Gbps Type-C

Network interfacesDifferent Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · The 1 Gb port is for BMC and IPMI connections only and does not support internet access. ASUS lists no wireless module for this board. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification · MSI says Wi-Fi 7 and its Bluetooth version need Windows 11 24H2 and that the Bluetooth version depends on the Wi-Fi chipset vendor; 6 GHz use depends on national rules. Link capabilities are not measured throughput. MSI PRO B850M-A WIFI — official product specifications	Realtek 10 Gb Ethernet; Intel 2.5 Gb Ethernet; Realtek 1 Gb dedicated BMC/IPMI management LAN	Realtek 8126VB 5G LAN; Wi-Fi 7 (160 MHz channels, up to 2.9 Gb/s); Bluetooth 5.4
Wired Ethernet Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Link-rate capability; real throughput depends on the connected network, cabling and workload. The Realtek 1 Gb port is for BMC/IPMI only. ASUS also lists ASUS LANGuard. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	Realtek 10 Gb Ethernet + Intel 2.5 Gb Ethernet (plus a 1 Gb BMC-only management port)	Not provided

Motherboard power connections Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Check the complete connector list and the PSU cable type. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	1 × 24-pin Main Power connector; 1 × 8-pin +12V CPU Power connector; 1 × 4-pin +12V CPU Power connector	Not provided
Rear Clear CMOS button Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Listed rear-panel control; follow the board manual before resetting firmware settings. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	Yes	Yes
Board and SSD cooling Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Manufacturer cooling design, not measured temperatures. ASUS's specification lists an M.2 heatsink without stating how many M.2 heatsinks there are or which of the two M.2 slots they cover. Its Q-Design list names M.2 Q-Latch for the SSD and no M.2 Q-Release heatsink switch. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	M.2 heatsink; aluminum heatsink design	Not provided
Fan and pump headersDifferent Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Header counts do not specify electrical current limits. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification · Header counts do not specify electrical current limits. MSI PRO B850M-A WIFI — official product specifications	1 CPU; 1 CPU OPT; 3 chassis fan headers (all 4-pin); 1 W_PUMP+	1 CPU; 1 pump/system combo; 3 system fan
Diagnostic indicatorsDifferent Sources ASUS Pro WS B850M-ACE SE Manufacturer specification ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI Manufacturer specification MSI PRO B850M-A WIFI — official product specifications	Q-Code; Q-LED (CPU, DRAM, VGA, boot device); BMC, message and location LEDs	4 × EZ Debug LED; 1 × EZ Memory Detection LED
Lighting headers Sources ASUS Pro WS B850M-ACE SE No source recorded. MSI PRO B850M-A WIFI Manufacturer specification · Addressable and analogue RGB connectors are different; check voltage before connecting lighting. The manual rates the 12 V JRGB connector at 3 A for up to 2 m of 5050 RGB strip, and each 5 V JARGB_V2 connector at 3 A for up to 240 individually addressable LEDs. MSI PRO B850M-A WIFI (shared PRO B850M-A WIFI / PRO B850M-A guide) — official motherboard user guide (PDF)	Not provided	3 addressable V2 (ARGB Gen2) RGB headers; 1 RGB header

Specification market Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · UK and US buying links are searches, not proof of stock, bundles or warranty. Confirm the exact model and part identifier with the retailer. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	ASUS UK documentation	Not provided
Remote management Sources ASUS Pro WS B850M-ACE SE Manufacturer specification · Out-of-band management through the BMC depends on configuration and network setup; ACC Express features depend on licensing and the operating system. ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	Onboard AST2600 BMC with dedicated 1 Gb IPMI LAN and VGA; ASUS Control Center Express (ACC Express) with activation key card; SPI TPM header	Not provided

Show unverified (1)Not verified, not provided or conflicting for both products. Kept for completeness; never counted as a difference.

Specifications without verified values for either product
Included Wi-Fi Sources ASUS Pro WS B850M-ACE SE The inspected specification lists Ethernet but does not establish an included Wi-Fi module. No capability or absence has been inferred. · Manufacturer specification ASUS Pro WS B850M-ACE SE — technical specifications (ASUS UK) MSI PRO B850M-A WIFI No source recorded.	Not provided	Not provided

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