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Asus B840M Max Gaming AX specifications and in-depth review

Asus B840M Max Gaming AX

Manufacturer: Asus

The Asus B840M Max Gaming AX is a Micro-ATX motherboard built around the AM5 socket, offering a compact footprint of 244 x 244 mm while packing a solid feature set for modern desktop builds. It comes with built-in Wi-Fi 6 (802.11ax) and Bluetooth 5.3, making it straightforward to set up a cable-free environment without needing additional adapters. RGB lighting and easy BIOS reset functionality round out the convenience-focused touches on this board.

On the memory side, the board supports DDR5 across four slots with a maximum capacity of 192 GB and overclocked speeds reaching up to 7600 MHz in dual-channel configuration. Storage connectivity includes three M.2 sockets and four SATA 3 connectors, with RAID 0, 1, 5, and 10 all supported. For expansion, there is one PCIe 4.0 x16 slot alongside three PCIe 3.0 x16 slots, and rear I/O includes seven USB ports of varying speeds plus a single DisplayPort output. Six fan headers and a TPM connector are also present on-board, and the three-year warranty covers the full unit.

Pros
  • Supports Wi-Fi 6 and Bluetooth 5.3 out of the box, removing the need for separate wireless adapters
  • Four DDR5 slots with support for up to 192 GB and overclocked speeds up to 7600 MHz offer substantial memory headroom
  • Three M.2 sockets alongside four SATA 3 connectors provide flexible storage configuration options
  • Dual BIOS and easy BIOS reset features reduce the risk of a failed update causing lasting issues
  • Six fan headers give meaningful control over system cooling across the board
  • RAID 0, 1, 5, and 10 support adds practical redundancy and performance options for multi-drive setups
Cons
  • No USB-C ports on the rear I/O panel limits connectivity for modern peripherals
  • Absence of PCIe 5.0 x16 slot means the board cannot take full advantage of the latest high-bandwidth expansion cards
  • No HDMI output restricts display options to a single DisplayPort, with no fallback for common monitor connections
  • ECC memory is not supported, which rules out use cases that require error-correcting RAM
  • No S/PDIF Out port limits digital audio output options for home theater or external DAC setups
Who is this for?

This board is a solid fit for desktop builders working with the AM5 platform who want a compact Micro-ATX layout without giving up meaningful expansion options. The combination of DDR5 support with up to 192 GB capacity and overclocked speeds reaching 7600 MHz makes it well suited for memory-intensive workloads such as content creation, video editing, or heavily multithreaded tasks. Users who prioritize a tidy, cable-managed setup will also appreciate the built-in Wi-Fi 6 and Bluetooth 5.3, while the six fan headers and three M.2 sockets cater to builders who want thorough cooling control and fast NVMe storage across multiple drives. The dual BIOS and easy overclock features make it approachable for enthusiasts who like to tune their system without worrying about recovery complications.

Who is this NOT for?

This board is not well suited for users who need high-bandwidth PCIe 5.0 connectivity, as the primary slot tops out at PCIe 4.0, which may limit throughput for the latest generation of storage or graphics solutions. Those who rely on a wide variety of rear-panel connections will find the I/O somewhat restrictive, given the absence of rear USB-C ports and the single DisplayPort output with no HDMI fallback. It is equally unsuitable for workstation or server-oriented builds that depend on ECC memory for data integrity, and users who need digital audio output via S/PDIF will need to look elsewhere, as that port is not present on this board.

General info:

CPU socket AM5
form factor Micro-ATX
supports Wi-Fi ✓
Wi-Fi version Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax)
Has Bluetooth ✓
Bluetooth version 5.3
Easy to overclock ✓
has RGB lighting ✓
Easy to reset BIOS ✓
Has dual BIOS ✓
has aptX ✕
CPU sockets 1
Has integrated graphics ✕
warranty period 3 years
height 244 mm
width 244 mm
Has integrated CPU ✕

The Asus B840M Max Gaming AX is built around the AM5 socket and adopts a Micro-ATX form factor, measuring 244 x 244 mm, which keeps it compact without sacrificing core functionality. It supports a single CPU and does not include an integrated processor or integrated graphics. Wireless connectivity is well covered, with Wi-Fi 6 (802.11ax) alongside backwards-compatible Wi-Fi 5 and Wi-Fi 4 standards, while Bluetooth 5.3 is also built in, though aptX is not supported. The board includes RGB lighting, a dual BIOS setup, and easy BIOS reset functionality, and overclocking is noted as straightforward. A three-year warranty accompanies the board.

Memory:

maximum memory amount 192GB
overclocked RAM speed 7600 MHz
memory slots 4
DDR memory version 5
memory channels 2
Supports ECC memory ✕

This board uses DDR5 memory across four slots arranged in a dual-channel configuration, supporting a maximum capacity of 192 GB. Overclocked RAM speeds of up to 7600 MHz are achievable, offering headroom for performance-oriented memory kits. ECC memory is not supported.

Ports:

USB 3.2 Gen 2 ports (USB-A) 2
USB 3.2 Gen 1 ports (USB-A) 1
USB 3.2 Gen 2 ports (USB-C) 0
USB 3.2 Gen 1 ports (USB-C) 0
USB 2.0 ports 4
USB 3.2 Gen 2x2 ports 0
USB 4 40Gbps ports 0
USB 4 20Gbps ports 0
Thunderbolt 4 ports 0
Thunderbolt 3 ports 0
has an HDMI output ✕
DisplayPort outputs 1
RJ45 ports 1
Has USB Type-C ✓
eSATA ports 0
DVI outputs 0
has a VGA connector ✕
PS/2 ports 0

The rear I/O offers a total of seven USB ports: two USB 3.2 Gen 2 Type-A, one USB 3.2 Gen 1 Type-A, and four USB 2.0 ports, with USB Type-C present on the board though no USB-C ports appear on the rear panel at Gen 1 or Gen 2 speeds. USB 4, Thunderbolt 3, and Thunderbolt 4 are not supported. For display output, there is a single DisplayPort, while HDMI, DVI, and VGA outputs are absent. Networking is handled by one RJ45 port, and there are no eSATA or PS/2 ports.

Connectors:

USB 3.2 Gen 1 ports (through expansion) 2
USB 2.0 ports (through expansion) 6
SATA 3 connectors 4
fan headers 6
USB 3.0 ports (through expansion) 2
M.2 sockets 3
Has TPM connector ✓
U.2 sockets 0
Has mSATA connector ✕
SATA 2 connectors 0

Storage connectivity is handled by three M.2 sockets and four SATA 3 connectors, with no SATA 2, mSATA, or U.2 sockets present. For USB expansion headers, the board provides two USB 3.2 Gen 1 connectors, two USB 3.0 connectors, and six USB 2.0 connectors, giving plenty of flexibility for front-panel and add-in connections. Cooling is well catered for with six fan headers on-board, and a TPM connector is also included for security module support.

Expansion slots:

PCIe 4.0 x16 slots 1
PCIe 5.0 x16 slots 0
PCIe 3.0 x16 slots 3
PCIe x1 slots 0
PCI slots 0
PCIe 2.0 x16 slots 0
PCIe x4 slots 0
PCIe x8 slots 0

The board provides one PCIe 4.0 x16 slot as the primary expansion option, complemented by three PCIe 3.0 x16 slots for additional cards. There are no PCIe 5.0 x16, PCIe 2.0 x16, PCIe x8, PCIe x4, PCIe x1, or legacy PCI slots present.

Audio:

audio channels 7.1
Has S/PDIF Out port ✕
audio connectors 3

The board supports 7.1 surround audio and includes three audio connectors for connecting speakers, headphones, and microphones. An S/PDIF Out port is not present.

Storage:

Supports RAID 1 ✓
Supports RAID 10 (1+0) ✓
Supports RAID 5 ✓
Supports RAID 0 ✓
Supports RAID 0+1 ✕

The board supports RAID 0, 1, 5, and 10 configurations, covering a practical range of striping, mirroring, and combined redundancy setups. RAID 0+1 is not supported.

Final Verdict

The Asus B840M Max Gaming AX delivers a well-rounded AM5 Micro-ATX platform that balances compact dimensions with a capable internal feature set. Its DDR5 support with up to 192 GB capacity and 7600 MHz overclocked speeds, combined with three M.2 sockets, built-in Wi-Fi 6, and six fan headers, gives it enough depth to serve both enthusiast and productivity-focused builds comfortably. Certain limitations — notably the absence of PCIe 5.0, rear USB-C ports, and ECC memory support — mean it is better positioned as a mainstream rather than a professional or bleeding-edge platform. For builders seeking a feature-rich, AM5-compatible Micro-ATX board with solid wireless connectivity, flexible storage options, and dependable BIOS management tools, the B840M Max Gaming AX represents a coherent and well-equipped choice.

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