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Asus B860M MAX Gaming AX specifications and in-depth review

Asus B860M MAX Gaming AX

Manufacturer: Asus

The Asus B860M MAX Gaming AX is a Micro-ATX motherboard built around the LGA 1851 socket and B860 chipset, targeting users who want a compact but well-equipped platform for Intel's current-generation processors. It includes integrated Wi-Fi 6 (802.11ax) and Bluetooth 5.3, along with RGB lighting and a dual BIOS setup for added resilience. The board carries a three-year warranty and measures 244 mm × 244 mm, fitting standard Micro-ATX cases without issue.

On the memory side, the board provides four DDR5 slots across two channels, supporting up to 256 GB and overclocked speeds reaching 8666 MHz. Expansion is handled by one PCIe 5.0 x16 slot alongside three PCIe 4.0 x16 slots, while storage options include three M.2 sockets, four SATA 3 connectors, and full RAID 0, 1, 5, and 10 support. Rear connectivity covers one USB 3.2 Gen 2x2 Type-C port, one USB 3.2 Gen 2 Type-A, four USB 3.2 Gen 1 Type-A, four USB 2.0 ports, a single DisplayPort output, and one RJ45 Ethernet jack, complemented by a 7.1-channel audio solution with three audio connectors.

Pros
  • Supports Wi-Fi 6 (802.11ax) with backward compatibility for Wi-Fi 5 and Wi-Fi 4, covering a wide range of wireless devices
  • Dual BIOS provides a built-in fallback in case of a corrupted or failed firmware update
  • Four DDR5 memory slots with dual-channel support and overclocked speeds up to 8666 MHz offer substantial memory bandwidth headroom
  • Three M.2 sockets alongside four SATA 3 connectors give plenty of storage installation flexibility
  • One PCIe 5.0 x16 slot accommodates the latest high-bandwidth graphics cards and add-in devices
  • Full RAID 0, 1, 5, and 10 support allows for versatile multi-drive storage configurations
Cons
  • No clear CMOS button makes resetting the BIOS less convenient, requiring manual jumper or alternative method
  • No HDMI output limits display connectivity to a single DisplayPort, reducing flexibility for multi-monitor setups without a discrete GPU
  • ECC memory is not supported, ruling out use cases that require error-correcting RAM
  • No S/PDIF optical output restricts audio connectivity options for users with digital audio equipment
  • No USB 4, Thunderbolt 3, or Thunderbolt 4 ports, leaving out high-speed peripheral and display daisy-chaining capabilities
Who is this for?

This board is well suited to desktop builders who want a compact Micro-ATX platform with modern connectivity built in, particularly those who value Wi-Fi 6 and Bluetooth 5.3 without needing separate adapter cards. The combination of a PCIe 5.0 slot, three M.2 sockets, DDR5 support with overclocking headroom, and full RAID capability makes it a solid choice for users who prioritize fast storage and memory configurations. It also fits enthusiasts who want a manageable form factor without giving up meaningful expansion, as well as those who appreciate the safety net of a dual BIOS when experimenting with firmware or overclocking settings.

Who is this NOT for?

Users who need Thunderbolt or USB 4 connectivity for high-speed peripherals, external displays, or daisy-chaining devices will find this board lacking, as none of those interfaces are present. It is also a poor fit for anyone requiring ECC memory support, such as those running workloads where data integrity is critical, since that feature is explicitly absent. Additionally, users who rely on multiple display outputs directly from the motherboard will run into limitations, as the board provides only a single DisplayPort and no HDMI, making it impractical without a dedicated graphics card for multi-monitor setups.

General info:

CPU socket LGA 1851
chipset B860
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 B860M MAX Gaming AX is built around the LGA 1851 socket and B860 chipset, housed in a Micro-ATX form factor measuring 244 mm × 244 mm with a single CPU socket and no integrated CPU or graphics. Wireless connectivity is well covered, with built-in Wi-Fi 6 (802.11ax) — also backward compatible with Wi-Fi 5 and Wi-Fi 4 — alongside Bluetooth 5.3, though aptX is not supported. The board includes RGB lighting and a dual BIOS for recovery purposes, and while overclocking is supported, there is no dedicated clear CMOS button for quick BIOS resets. It carries a three-year warranty.

Memory:

maximum memory amount 256GB
overclocked RAM speed 8666 MHz
memory slots 4
DDR memory version 5
memory channels 2
Supports ECC memory ✕

The board supports DDR5 memory across four slots arranged in a dual-channel configuration, with a maximum capacity of 256 GB and overclocked speeds reaching up to 8666 MHz. ECC memory is not supported, making this platform suited for consumer rather than workstation or server use cases.

Ports:

USB 3.2 Gen 2 ports (USB-A) 1
USB 3.2 Gen 1 ports (USB-A) 4
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 1
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 panel offers a reasonable spread of USB connectivity, including one USB 3.2 Gen 2x2 Type-C port, one USB 3.2 Gen 2 Type-A port, four USB 3.2 Gen 1 Type-A ports, and four USB 2.0 ports; there are no USB 4, Thunderbolt 3, or Thunderbolt 4 ports. Video output is limited to a single DisplayPort, with no HDMI, DVI, or VGA connector present. Networking is handled by one RJ45 port, and there are no eSATA or PS/2 ports on this board.

Connectors:

USB 3.2 Gen 1 ports (through expansion) 2
USB-C 3.2 Gen 2 ports (through expansion) 1
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

Internal connectivity includes three M.2 sockets and four SATA 3 connectors for storage, while SATA 2 and mSATA are not available, and there are no U.2 sockets. USB expansion headers cover two USB 3.2 Gen 1 ports, two additional USB 3.0 ports, one USB-C 3.2 Gen 2 port, and six USB 2.0 ports, allowing for a broad range of front-panel and add-in connectivity. The board also provides six fan headers and a TPM connector, rounding out a well-populated set of internal interfaces.

Expansion slots:

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

The board offers a total of four full-length PCIe slots, led by one PCIe 5.0 x16 slot for the primary graphics card or high-speed add-in card, complemented by three PCIe 4.0 x16 slots for additional expansion. There are no PCIe 3.0, PCIe 2.0, PCIe x8, PCIe x4, PCIe x1, or legacy PCI slots present, keeping the layout focused on modern, high-bandwidth interfaces.

Audio:

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

The onboard audio supports 7.1-channel surround sound and provides three analog audio connectors on the rear panel. There is no S/PDIF optical output available on this board.

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 solid range of striping, mirroring, and combined redundancy options for multi-drive setups. RAID 0+1 is not supported.

Final Verdict

The Asus B860M MAX Gaming AX delivers a well-rounded Micro-ATX package for LGA 1851 builds, combining DDR5 support with overclocking up to 8666 MHz, three M.2 sockets, and a PCIe 5.0 primary slot within a compact footprint. Integrated Wi-Fi 6, Bluetooth 5.3, and a dual BIOS add practical value for everyday use and peace of mind during firmware updates. Its limitations — namely the absence of Thunderbolt, USB 4, ECC memory, and a sparse video output selection — mean it is best positioned for enthusiast desktop builds rather than professional workstation or high-connectivity workflows. For users who need a modern, feature-complete compact board without stepping up to a full ATX form factor, this board makes a compelling and capable choice.

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