Asus B840M Prime A WiFi - 4x DDR5, 3x M.2, AM5, mATX

ASUSSKU MB-AB840MPA+WOut of stock

R 4 796

Supports AMD Ryzen 7000, 8000 and 9000 Series processors
AMD B840 chipset
DDR5 memory support
PCIe 4.0 x16 graphics slot

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Key features

The highlights that matter most

Supports AMD Ryzen 7000, 8000 and 9000 Series processors
AMD B840 chipset
DDR5 memory support
PCIe 4.0 x16 graphics slot
Multiple PCIe 4.0 M.2 SSD slots
Integrated WiFi 6E

Product information

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Full details

Complete description and feature breakdown

The ASUS PRIME B840M-A WIFI is designed to provide a reliable and feature-rich foundation for modern AMD desktop systems. Supporting Ryzen 7000, 8000, and 9000 Series processors, it features DDR5 memory support, PCIe 4.0 expansion, WiFi 6E, 2.5 Gigabit Ethernet, and multiple M.2 storage slots, delivering responsive performance for gaming, productivity, and everyday computing. Built with ASUS reliability and intelligent cooling, it offers an excellent balance of performance, efficiency, and value.

Engineered with user-friendly features such as BIOS FlashBack, pre-mounted I/O shielding, and comprehensive fan controls, the motherboard simplifies both system building and long-term maintenance. Whether you're upgrading an existing PC or building a new compact desktop, the PRIME B840M-A WIFI delivers dependable performance, modern connectivity, and excellent flexibility for future upgrades.

Key Features

Supports AMD Ryzen 7000, 8000 and 9000 Series processors
AMD B840 chipset
DDR5 memory support
PCIe 4.0 x16 graphics slot
Multiple PCIe 4.0 M.2 SSD slots
Integrated WiFi 6E
2.5 Gigabit Ethernet
USB Type-C connectivity
ASUS BIOS FlashBack
Comprehensive cooling and Fan Xpert controls

Specifications

41 technical specs

SKU: MB-AB840MPA+W
Barcode: PRIME-B840M-AWIFI
Brand: ASUS
ARGB Headers: 3x Addressable RGB Gen2
Audio Channels: 7.1
Audio Chipset: Realtek Audio
Audio Ports: 1x Line-Out 1x Mic-in 1x Line-In
Bluetooth: Bluetooth 5.3
Brand: Asus
Chipset: AMD B840
Color: Black
CPU Socket: AM5
Dimensions: 244mm x 244mm
Display Ports: 2x Display Port 1x HDMI
Dual Channel Support: Yes
Fan Headers: 1x CPU fan header 1x CPU opt fan header 1x AIO Pump header 3x chassis fan header
Form Factor: Micro ATX
LAN: Realtek 2.5GbE LAN
LAN Ports: 1x RJ45
M.2 Slots: 2x PCIe 4.0 1x PCIe 3.0
Maximum Capacity: 256GB (64GB per module)
Memory Overclocking: AMD EXPO + Intel XMP
Memory Slots: 4x DIMM
Memory Speed: Up to DDR5-7600(OC)/5200
Memory Type: DDR5
Model: PRIME B840M-A WIFI
Onboard Graphics: AMD Radeon Graphics
PCIe x1 Slots: N/A
PCIe x16 Slots: 1x PCIe 4.0 x16 2x PCIe 3.0 x1
Power Connector: 1x 24-pin ATX 1x 8-pin ATX 12V
RAID Support: NVMe: RAID 0/1/5/10 SATA: RAID 0/1/10
Requirements: CPU with integrated graphics required
RGB Headers: N/A
S/PDIF Support: No
SATA Ports: 4x SATA 6Gb/s
Serial / LPT Header: 1x Serial
Supported CPUs: Ryzen 9000 / 8000 / 7000 Series
TPM Header: Yes
USB Headers: 1x USB 3.2 Gen 1 Type-C 1x USB 3.2 Gen1 2x USB2.0/1.1
USB Ports: 1x USB 3.2 Gen 1 Type-C 2x USB 3.2 Gen 2 Type-A 4x USB 2.0 Type-A
Video Outputs: 2x Display Port 1x HDMI
Warranty: 3 Years
WiFi: Realtek Wi-Fi 6E
WiFi Antenna: Yes