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ASUS B840M MAX GAMING AX vs ASUS PRIME B840-PLUS WIFI

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

Compared products

YOUR FIRST CHOICE

ASUS B840M MAX GAMING AX

Global manufacturer specification · B840M MAX GAMING AX

Full product profile Official image

Exact model & source notes

B840M MAX GAMING AX motherboard, identified in the ASUS Global catalogue. Specifications below retain the manufacturer’s configuration and interface conditions.

Specifications checked 17 Oct 2026.

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

Manufacturer specifications

WHICH SUITS YOU?

Choose the B840M MAX GAMING AX for

A micro-ATX board

Choose the PRIME B840-PLUS WIFI for

An ATX board

Built from verified specifications that differ. Not a rating or a recommendation.

See the 7 verified differences

THE CONTENDER

ASUS PRIME B840-PLUS WIFI

UK manufacturer specification · PRIME B840-PLUS WIFI

Full product profile Official image

Exact model & source notes

PRIME B840-PLUS WIFI motherboard, identified in the ASUS UK catalogue. Specifications below retain the manufacturer’s configuration and interface conditions.

Specifications checked 17 Oct 2026.

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

Manufacturer specifications

B840M MAX GAMING AX UK & US retailers

UK & US price history: no verified listing yet

PRIME B840-PLUS WIFI UK & US retailers

UK & US price history: no verified listing yet

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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 SIDE7 topics

SELECTED TOPIC

01 / 07

Form factor and dimensions

Check the exact configuration and source conditions for your use.

ASUS B840M MAX GAMING AXmicro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

Manufacturer specification

Source 1

ASUS PRIME B840-PLUS WIFIATX Form Factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )

Manufacturer specification

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.

Form factor and dimensions

In Visual facts

ASUS B840M MAX GAMING AXmicro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

ASUS PRIME B840-PLUS WIFIATX Form Factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )

Sources

ASUS B840M MAX GAMING AX

Manufacturer specification

ASUS B840M MAX GAMING AX — official Global technical specifications

ASUS PRIME B840-PLUS WIFI

Manufacturer specification

ASUS PRIME B840-PLUS WIFI — official UK technical specifications

Check the exact configuration and source conditions for your use.

Storage interfaces and restrictions

In Visual facts

ASUS B840M MAX GAMING AXSupports 3 x M.2 slots and 4 x SATA 6Gb/s ports AMD Ryzen™ 9000 & 7000 Series Desktop Processors M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) AMD Ryzen™ 8000 Series Desktop Processors M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode)* AMD B840 Chipset M.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x2 mode 6 x SATA 6Gb/s ports * Specifications vary by CPU types. AMD RAIDXpert2 Technology Ryzen™ 9000 Series Processors: RAID 0/1/5/10 Ryzen™ 8000 Series Processors: RAID 0/1 Ryzen™ 7000 Series Processors: RAID 0/1/10

ASUS PRIME B840-PLUS WIFISupports 3 x M.2 slots and 4 x SATA 6Gb/s ports AMD Ryzen™ 9000 & 7000 Series Desktop Processors M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) AMD Ryzen™ 8000 Series Desktop Processors M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode)* AMD B840 Chipset M.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 mode 4 x SATA 6Gb/s ports * Specifications vary by CPU types. AMD RAIDXpert2 Technology Ryzen™ 9000 Series Processors: RAID 0/1/5/10 Ryzen™ 8000 Series Processors: RAID 0/1 Ryzen™ 7000 Series Processors: RAID 0/1/10

Sources

ASUS B840M MAX GAMING AX

Manufacturer specification

ASUS B840M MAX GAMING AX — official Global technical specifications

ASUS PRIME B840-PLUS WIFI

Manufacturer specification

ASUS PRIME B840-PLUS WIFI — official UK technical specifications

Check the exact configuration and source conditions for your use.

Network interfaces and requirements

In Visual facts

ASUS B840M MAX GAMING AX1 x Realtek 2.5Gb Ethernet ASUS LANGuard; Wi-Fi 6 1x1 Wi-Fi 6 (802.11ax) Supports 2.4/5GHz frequency band Bluetooth® v5.3* * The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications.

ASUS PRIME B840-PLUS WIFI1 x Realtek 2.5Gb Ethernet ASUS LANGuard; "Wi-Fi 6E 2x2 Wi-Fi 6E (802.11ax) Supports 2.4/5/6GHz frequency band* Bluetooth® v5.3** * WiFi 6E 6GHz regulatory may vary between countries, supported only in Windows 11 or later. ** The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications."

Sources

ASUS B840M MAX GAMING AX

Manufacturer specification

ASUS B840M MAX GAMING AX — official Global technical specifications

ASUS PRIME B840-PLUS WIFI

Manufacturer specification

ASUS PRIME B840-PLUS WIFI — official UK technical specifications

Check the exact configuration and source conditions for your use.

Expansion slots and restrictions

In Visual facts

ASUS B840M MAX GAMING AXAMD Ryzen™ 9000 & 7000 Series Desktop Processors* 1 x PCIe 4.0 x16 slot (supports x16 mode) AMD Ryzen™ 8000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x8/x4 mode)** AMD B840 Chipset 3 x PCIe 3.0 x16 slots (support x1 mode) * Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/). ** Specifications vary by CPU types. - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.

ASUS PRIME B840-PLUS WIFIAMD Ryzen™ 9000 & 7000 Series Desktop Processors* 1 x PCIe 4.0 x16 slot (supports x16 mode) AMD Ryzen™ 8000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x8/x4 mode)** AMD B840 Chipset 1 x PCIe 3.0 x16 slot (support x4 mode)*** 2 x PCIe 3.0 x16 slots (support x1 mode)*** 1 x PCIe 3.0 x1 slot*** * Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/). ** Specifications vary by CPU types. *** The PCIEX16(G3)_1/3 and PCIEX1(G3) share bandwidth with PCIEX16(G3)_2. The PCIEX16(G3)_2 will run x1 mode when any of the PCIEX16(G3)_1/3 and PCIEX1(G3) slots is occupied. - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.

Sources

ASUS B840M MAX GAMING AX

Manufacturer specification

ASUS B840M MAX GAMING AX — official Global technical specifications

ASUS PRIME B840-PLUS WIFI

Manufacturer specification

ASUS PRIME B840-PLUS WIFI — official UK technical specifications

Check the exact configuration and source conditions for your use.

Internal headers and connectors

In Visual facts

ASUS B840M MAX GAMING AXFan and Cooling Related 1 x 4-pin CPU Fan header 1 x 4-pin CPU OPT Fan header 1 x 4-pin AIO Pump header 4 x 4-pin Chassis Fan header Power Related 1 x 24-pin Main Power connector 1 x 8-pin +12V CPU Power connectors Storage Related 3 x M.2 slots (Key M) 6 x SATA 6Gb/s ports USB 1 x USB 5Gbps connector (supports USB Type-C® ) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 3 x USB 2.0 headers support 6 additional USB 2.0 ports Miscellaneous 3 x Addressable Gen 2 headers 1 x Clear CMOS header 1 x COM Port header 1 x Front Panel Audio header (F_AUDIO) 1 x S/PDIF Out header 1 x SPI TPM header (14-1 pin) 1 x 10-1 pin Front System Panel header

ASUS PRIME B840-PLUS WIFIFan and Cooling Related 1 x 4-pin CPU Fan header 1 x 4-pin CPU OPT Fan header 1 x 4-pin AIO Pump header 4 x 4-pin Chassis Fan header Power Related 1 x 24-pin Main Power connector 1 x 8-pin +12V CPU Power connectors 1 x 4-pin +12V CPU Power connectors Storage Related 3 x M.2 slots (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 5Gbps connector (supports USB Type-C® ) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports Miscellaneous 3 x Addressable Gen 2 headers 1 x Clear CMOS header 1 x Chassis Intrusion header 1 x COM Port header 1 x Front Panel Audio header (F_AUDIO) 1 x S/PDIF Out header 1 x SPI TPM header (14-1 pin) 1 x 10-1 pin System Panel header 1 x Thunderbolt™ (USB4®) header

Sources

ASUS B840M MAX GAMING AX

Manufacturer specification

ASUS B840M MAX GAMING AX — official Global technical specifications

ASUS PRIME B840-PLUS WIFI

Manufacturer specification

ASUS PRIME B840-PLUS WIFI — official UK technical specifications

Check the exact configuration and source conditions for your use.

Rear-panel ports

In Visual facts

ASUS B840M MAX GAMING AX2 x USB 10Gbps ports (2 x Type-A) 1 x USB 5Gbps port (1 x USB Type-C®) 4 x USB 2.0 ports (4 x Type-A) 1 x DisplayPort 1 x Wi-Fi module 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks 1 x BIOS FlashBack™ button

ASUS PRIME B840-PLUS WIFI1 x USB 10Gbps port (1 x USB Type-C®) 1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A) 1 x DisplayPort 1 x HDMI™ port 1 x Wi-Fi module 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks 1 x BIOS FlashBack™ button

Sources

ASUS B840M MAX GAMING AX

Manufacturer specification

ASUS B840M MAX GAMING AX — official Global technical specifications

ASUS PRIME B840-PLUS WIFI

Manufacturer specification

ASUS PRIME B840-PLUS WIFI — official UK technical specifications

Check the exact configuration and source conditions for your use.

Show 1 more verified difference

USB ports and headers

In Visual facts

ASUS B840M MAX GAMING AXRear USB (Total 7 ports) 2 x USB 10Gbps ports (2 x Type-A) 1 x USB 5Gbps port (1 x USB Type-C®) 4 x USB 2.0 ports (4 x Type-A) Front USB (Total 9 ports) 1 x USB 5Gbps connector (supports USB Type-C®) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 3 x USB 2.0 headers support 6 additional USB 2.0 ports * USB Type-C® power delivery output: max. 5V/3A

ASUS PRIME B840-PLUS WIFIRear USB (Total 8 ports) 2 x USB 10Gbps port(s) (1 x Type-A + 1 x USB Type-C®) 2 x USB 5Gbps ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A) Front USB (Total 7 ports) 1 x USB 5Gbps connector (supports USB Type-C®) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports * USB Type-C® power delivery output: max. 5V/3A

Sources

ASUS B840M MAX GAMING AX

Manufacturer specification

ASUS B840M MAX GAMING AX — official Global technical specifications

ASUS PRIME B840-PLUS WIFI

Manufacturer specification

ASUS PRIME B840-PLUS WIFI — official UK technical specifications

Check the exact configuration and source conditions for your use.

6 shared fields have the same recorded value.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

ASUS B840M MAX GAMING AX

What it brings

Published motherboard interfaces and configuration are available from the exact-model ASUS specification source.
Manufacturer source

What to check

Compatibility and maximum operating modes depend on the source’s stated hardware, firmware and connection requirements; manufacturer figures are not independent measurements.
Manufacturer source

ASUS PRIME B840-PLUS WIFI

What it brings

Published motherboard interfaces and configuration are available from the exact-model ASUS specification source.
Manufacturer source

What to check

Compatibility and maximum operating modes depend on the source’s stated hardware, firmware and connection requirements; manufacturer figures are not independent measurements.
Manufacturer source

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

13 of 13 specifications Sources in each row

Source-backed specifications for ASUS B840M MAX GAMING AX and ASUS PRIME B840-PLUS WIFI
Specification	ASUS B840M MAX GAMING AX	ASUS PRIME B840-PLUS WIFI

CPU socket Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	AM5	AM5
Chipset Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	AMD B840 Chipset	AMD B840 Chipset
Form factor and dimensionsDifferent Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	micro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)	ATX Form Factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )
CPU support and BIOS requirements Sources ASUS B840M MAX GAMING AX Manufacturer specification · Exact CPU support and BIOS revision depend on the processor and the current ASUS CPU support list; the family statement is not a guarantee for every processor. ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification · Exact CPU support and BIOS revision depend on the processor and the current ASUS CPU support list; the family statement is not a guarantee for every processor. ASUS PRIME B840-PLUS WIFI — official UK technical specifications	AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors* Supports up to AMD 170W CPU * Refer to https://www.asus.com/support/download-center/ for CPU support list. BIOS: 256 Mb Flash ROM, UEFI AMI BIOS	AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors* Supports up to AMD 170W CPU * Refer to https://www.asus.com/support/download-center/ for CPU support list. BIOS: 256 Mb Flash ROM, UEFI AMI BIOS
Listed operating systems Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	Windows® 11, Windows® 10 64-bit	Windows® 11, Windows® 10 64-bit

Memory type, slots and limit Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	4 x DIMM slots, max. 256GB, DDR5 Supports up to 7600+MT/s (OC) with Ryzen™ 9000 & 8000 & 7000 Series Processors, ECC and Non-ECC Un-buffered DIMM* Dual channel memory architecture Supports AMD Extended Profiles for Overclocking (EXPO™) ASUS Enhanced Memory Profile (AEMP) * Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/download-center/. Adjustments will be made based on the specifications of mass-produced memory products available on the market. * Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.	4 x DIMM slots, max. 256GB, DDR5 Supports up to 7600+MT/s (OC) with Ryzen™ 9000 & 8000 & 7000 Series Processors, ECC and Non-ECC Un-buffered DIMM* Dual channel memory architecture Supports AMD Extended Profiles for Overclocking (EXPO™) ASUS Enhanced Memory Profile (AEMP) * Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/download-center/. Adjustments will be made based on the specifications of mass-produced memory products available on the market. * Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.

Storage interfaces and restrictionsDifferent Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	Supports 3 x M.2 slots and 4 x SATA 6Gb/s ports AMD Ryzen™ 9000 & 7000 Series Desktop Processors M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) AMD Ryzen™ 8000 Series Desktop Processors M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode)* AMD B840 Chipset M.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x2 mode 6 x SATA 6Gb/s ports * Specifications vary by CPU types. AMD RAIDXpert2 Technology Ryzen™ 9000 Series Processors: RAID 0/1/5/10 Ryzen™ 8000 Series Processors: RAID 0/1 Ryzen™ 7000 Series Processors: RAID 0/1/10	Supports 3 x M.2 slots and 4 x SATA 6Gb/s ports AMD Ryzen™ 9000 & 7000 Series Desktop Processors M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) AMD Ryzen™ 8000 Series Desktop Processors M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode)* AMD B840 Chipset M.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 mode 4 x SATA 6Gb/s ports * Specifications vary by CPU types. AMD RAIDXpert2 Technology Ryzen™ 9000 Series Processors: RAID 0/1/5/10 Ryzen™ 8000 Series Processors: RAID 0/1 Ryzen™ 7000 Series Processors: RAID 0/1/10

Expansion slots and restrictionsDifferent Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	AMD Ryzen™ 9000 & 7000 Series Desktop Processors* 1 x PCIe 4.0 x16 slot (supports x16 mode) AMD Ryzen™ 8000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x8/x4 mode)** AMD B840 Chipset 3 x PCIe 3.0 x16 slots (support x1 mode) * Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/). ** Specifications vary by CPU types. - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.	AMD Ryzen™ 9000 & 7000 Series Desktop Processors* 1 x PCIe 4.0 x16 slot (supports x16 mode) AMD Ryzen™ 8000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x8/x4 mode) AMD B840 Chipset 1 x PCIe 3.0 x16 slot (support x4 mode)* 2 x PCIe 3.0 x16 slots (support x1 mode)* 1 x PCIe 3.0 x1 slot* * Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/). Specifications vary by CPU types. * The PCIEX16(G3)_1/3 and PCIEX1(G3) share bandwidth with PCIEX16(G3)_2. The PCIEX16(G3)_2 will run x1 mode when any of the PCIEX16(G3)_1/3 and PCIEX1(G3) slots is occupied. - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.

USB ports and headersDifferent Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	Rear USB (Total 7 ports) 2 x USB 10Gbps ports (2 x Type-A) 1 x USB 5Gbps port (1 x USB Type-C®) 4 x USB 2.0 ports (4 x Type-A) Front USB (Total 9 ports) 1 x USB 5Gbps connector (supports USB Type-C®) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 3 x USB 2.0 headers support 6 additional USB 2.0 ports * USB Type-C® power delivery output: max. 5V/3A	Rear USB (Total 8 ports) 2 x USB 10Gbps port(s) (1 x Type-A + 1 x USB Type-C®) 2 x USB 5Gbps ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A) Front USB (Total 7 ports) 1 x USB 5Gbps connector (supports USB Type-C®) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports * USB Type-C® power delivery output: max. 5V/3A
Rear-panel portsDifferent Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	2 x USB 10Gbps ports (2 x Type-A) 1 x USB 5Gbps port (1 x USB Type-C®) 4 x USB 2.0 ports (4 x Type-A) 1 x DisplayPort 1 x Wi-Fi module 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks 1 x BIOS FlashBack™ button	1 x USB 10Gbps port (1 x USB Type-C®) 1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A) 1 x DisplayPort 1 x HDMI™ port 1 x Wi-Fi module 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks 1 x BIOS FlashBack™ button
Audio interfaces Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	Realtek 7.1 Surround Sound High Definition Audio CODEC* - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking - Supports up to 24-Bit/192 kHz playback Audio Features - Audio Shielding - Premium audio capacitors - Dedicated audio PCB layers * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.	Realtek 7.1 Surround Sound High Definition Audio CODEC* - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking - Supports up to 24-Bit/192 kHz playback Audio Features - Audio Shielding - Premium audio capacitors - Dedicated audio PCB layers * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.

Network interfaces and requirementsDifferent Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	1 x Realtek 2.5Gb Ethernet ASUS LANGuard; Wi-Fi 6 1x1 Wi-Fi 6 (802.11ax) Supports 2.4/5GHz frequency band Bluetooth® v5.3* * The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications.	1 x Realtek 2.5Gb Ethernet ASUS LANGuard; "Wi-Fi 6E 2x2 Wi-Fi 6E (802.11ax) Supports 2.4/5/6GHz frequency band* Bluetooth® v5.3** * WiFi 6E 6GHz regulatory may vary between countries, supported only in Windows 11 or later. ** The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications."

Internal headers and connectorsDifferent Sources ASUS B840M MAX GAMING AX Manufacturer specification ASUS B840M MAX GAMING AX — official Global technical specifications ASUS PRIME B840-PLUS WIFI Manufacturer specification ASUS PRIME B840-PLUS WIFI — official UK technical specifications	Fan and Cooling Related 1 x 4-pin CPU Fan header 1 x 4-pin CPU OPT Fan header 1 x 4-pin AIO Pump header 4 x 4-pin Chassis Fan header Power Related 1 x 24-pin Main Power connector 1 x 8-pin +12V CPU Power connectors Storage Related 3 x M.2 slots (Key M) 6 x SATA 6Gb/s ports USB 1 x USB 5Gbps connector (supports USB Type-C® ) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 3 x USB 2.0 headers support 6 additional USB 2.0 ports Miscellaneous 3 x Addressable Gen 2 headers 1 x Clear CMOS header 1 x COM Port header 1 x Front Panel Audio header (F_AUDIO) 1 x S/PDIF Out header 1 x SPI TPM header (14-1 pin) 1 x 10-1 pin Front System Panel header	Fan and Cooling Related 1 x 4-pin CPU Fan header 1 x 4-pin CPU OPT Fan header 1 x 4-pin AIO Pump header 4 x 4-pin Chassis Fan header Power Related 1 x 24-pin Main Power connector 1 x 8-pin +12V CPU Power connectors 1 x 4-pin +12V CPU Power connectors Storage Related 3 x M.2 slots (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 5Gbps connector (supports USB Type-C® ) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports Miscellaneous 3 x Addressable Gen 2 headers 1 x Clear CMOS header 1 x Chassis Intrusion header 1 x COM Port header 1 x Front Panel Audio header (F_AUDIO) 1 x S/PDIF Out header 1 x SPI TPM header (14-1 pin) 1 x 10-1 pin System Panel header 1 x Thunderbolt™ (USB4®) header

First product manufacturer source Second product manufacturer source

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ASUS PRIME B840-PLUS WIFI-CSM

CPU socket: AM5
Chipset: AMD B840 Chipset
Form factor and dimensions: ATX Form Factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )

Prices & product profile

ASUS PRIME B840M-A WIFI

CPU socket: AM5
Chipset: AMD B840 Chipset
Form factor and dimensions: micro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

Prices & product profile

ASUS PRIME B840M-A WIFI-CSM

CPU socket: AM5
Chipset: AMD B840 Chipset
Form factor and dimensions: micro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

Prices & product profile

ASUS PRIME B840M-A-CSM

CPU socket: AM5
Chipset: AMD B840 Chipset
Form factor and dimensions: micro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

Prices & product profile

Each record represents an explicitly checked model and configuration. Original import: 5 Sept 2026; this is not its verification date. This is not a list of current offers or a popularity ranking.