Asus Prime B840M-A WiFi Gaming Motherboard, AMD B840, AM5, Micro ATX, DDR5, Wi-Fi 6E, 2.5G LAN

Asus B850M-A AMD Gaming Motherboard M-ATX

The Asus Prime B840M-A WiFi is a Micro ATX motherboard tailored for AMD AM5 processors, supporting the latest DDR5 memory for enhanced performance. Equipped with Wi-Fi 6E and 2.5G LAN, it ensures fast and reliable connectivity. Its robust design and advanced features make it ideal for gamers and professionals seeking stability and speed in a compact form factor.

Specifications

Motherboard Type: Desktop

Form Factor: Micro ATX

Socket: AMD AM5

Chipset: AMD B840

RAM Technology
DDR5 (Dual Channel)
ECC and Non-ECC Un-buffered DIMM*
Supports AMD EXPO
ASUS AEMP
*Non-ECC, un-buffered DDR5 memory supports On-Die ECC function

RAM Slots: 4 x DIMM

RAM Speeds: Up to 7600+MT/s (OC)

Maximum Memory: 256GB

Graphics
Integrated Graphics
Graphics specifications may vary between CPU types

Graphics Ports: 1 x HDMI, 2 x DisplayPort

PCI/PCI Express
Ryzen 9000 & 7000 Series CPUs: 1 x PCIe 4.0 x16 (supports x16 mode)
Ryzen 8000 Series CPUs: 1 x PCIe 4.0 x16 (supports x8/x4 mode)
AMD B840 Chipset: 2 x PCIe 3.0 x16 (support x1 mode)

Storage
4 x SATA III
3 x M.2

Ryzen 9000, 8000 & 7000 Series CPUs:
M.2_1 (2280) - PCIe 4.0 x4
M.2_2 (2242/2260/2280) - PCIe 4.0 x4

AMD B840 Chipset:
M.2_3 (2280) - PCIe 3.0 x4

RAID: AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/5/10 and SATA RAID 0/1/5/10. RAID 5 Function is only supported by AMD Ryzen 9000 series CPU

Wireless
Wi-Fi 6E
2x2 Wi-Fi 6E (802.11ax)
Supports 2.4/5/6GHz frequency band
Bluetooth v5.3

LAN: 2.5GB LAN

Audio: Realtek 7.1 Surround Sound High Definition Audio CODEC

USB Ports Supported
Rear:
2 x USB 10Gbps Type-A
1 x USB 5Gbps Type-C
4 x USB 2.0

Front:
1 x USB 5Gbps Type-C
2 x USB 5Gbps
4 x USB 2.0

Back Panel I/O Ports
2 x USB 10Gbps Type-A
1 x USB 5Gbps Type-C
4 x USB 2.0
2 x DisplayPort
1 x HDMI
1 x Wi-Fi module
1 x Realtek 2.5Gb Ethernet
3 x Audio jacks
1 x BIOS FlashBack button

Internal I/O Connectors
1 x 4-pin CPU Fan
1 x 4-pin CPU OPT Fan
1 x 4-pin AIO Pump
3 x 4-pin Chassis Fan
1 x 24-pin Main
1 x 8-pin +12V CPU
3 x M.2 (Key M)
4 x SATA 6Gb/s
1 x USB 5Gbps Type-C
1 x USB 5Gbps
2 x USB 2.0
3 x Addressable Gen2 1 x Clear CMOS
1 x COM Port
1 x Front Panel Audio
1 x S/PDIF Out
1 x SPI TPM (14-1 pin)
1 x 10-1 pin Front System Panel

Accessories
2 x SATA 6Gb/s cables
1 x ASUS WiFi Q-Antenna
1 x M.2 rubber package
3 x Screw packages for M.2 SSD
1 x Quick start guide