ASUS Prime B840M-A WiFi-CSM

ASUS Prime B840M-A WiFi-CSM AM5 B840 DDR5 PCIe 4.0 3x M.2 Slots Wi-Fi 6E 2.5Gb LAN DisplayPort HDMI USB 5Gbps Type-C micro ATX

ASUS Prime B840M-A WiFi-CSM AM5 B840 DDR5 PCIe 4.0 3x M.2 Slots Wi-Fi 6E 2.5Gb LAN DisplayPort HDMI USB 5Gbps Type-C micro ATX

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  • ASUS Corporate Stable Model (CSM) is a commercial program designed to provide stable and reliable motherboards.
  • Ready for Advanced AI PC: Designed for the future of AI computing, with the power and connectivity needed for demanding AI applications
  • AMD AM5 Socket: Ready for AMD Socket AM5 for AMD Ryzen 9000 & 8000 & 7000 Series Desktop Processors
  • Enhanced Power Solution: 6-layer PCB, alloy chokes and durable capacitors for stable power delivery
  • Ultrafast Connectivity: Wi-Fi 6E, PCIe 4.0 x16 slot, PCIe 4.0 M.2 slots, Realtek 2.5Gb Ethernet, rear USB 10Gbps Type-A ports, rear and front USB 5Gbps Type-C support
  • Comprehensive Cooling: VRM and M.2 heatsinks, PCH heatsink, hybrid fan headers and Fan Xpert 2+
  • DIY Friendly Design: Pre-mounted I/O shield, BIOS FlashBack, M.2 heatsink, Q-Antenna, Q-Dashboard, Q-LED Core
  • Unmatched Personalization: Three Addressable Gen 2 headers, all configurable with ASUS-exclusive Aura Sync RGB lighting
  • Renowned Software: Armoury Crate, ASUS DriverHub, ASUS GlideX, ASUS MyHotkey

Specifications Overview

Model
  • PRIME B840M-A WIFI-CSM
  • 90MB1J20-MVAAYC
Release Date January 2025

* First availability for purchase, it may not correspond to the actual market launch date.

Socket AM5
Form factor Micro ATX
Chipset AMD B840
Supported Memory DDR5
4400Mhz 7600Mhz
* High clock speeds may require enabling the XMP profile in the motherboard BIOS
** RAM support may also depend on the CPU memory controller
ECC RAM Support No
Audio Channels Realtek 7.1 Surround Sound High Definition Audio CODEC
Max LAN Speed 2.5Gbps
SLI Support No
CrossFire Support No
RAID Support Yes
Back Connect No
Back I/O 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)
  • 2 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
Wireless LAN Yes
Wi-Fi Generation 6E
PCI-Express x16 Slots 3
PCI-Express x4 Slots 0
PCI-Express x1 Slots 0
SATA 6 Gbps Ports 4
SATA Express Ports 0
M.2 Ports 3
M.2 Devices support
  • 2280 - M Key
  • 2242 / 2260 / 2280 - M Key
  • 2280 - M Key
RAM Slots 4
Maximum Supported RAM 192 GB
Onboard USB 2.0 2
Onboard USB 3.2 Gen 1 1
Onboard USB 3.2 Gen 2 1
Onboard USB 3.2 Gen 2x2 0


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