ASUS Pro WS B850M-ACE SE

Check case mounting positions and connector clearance.

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

Physical DDR5 module positions; this count is not a guarantee of capacity or profile speed.

Manufacturer capacity ceiling; check CPU support, BIOS and the validated DIMM population.

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

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

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

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.

SATA 6 Gb/s. Enabling the U.2 connector in BIOS disables the SATA ports.

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. · 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.

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

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.

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.

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

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.

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.

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

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

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

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.

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.

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

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

Check the complete connector list and the PSU cable type.

Header counts do not specify electrical current limits.

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

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.

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

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

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.

Listed rear-panel control; follow the board manual before resetting firmware settings.

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