ASUS PRIME B850M-A WiFi Motherboard Socket AM5 AMD B850 Micro-ATX DDR5
ASUS PRIME B850M-A WiFi Motherboard Socket AM5 AMD B850 Micro-ATX DDR5, photo 2
ASUS PRIME B850M-A WiFi Motherboard Socket AM5 AMD B850 Micro-ATX DDR5, photo 3
ASUS PRIME B850M-A WiFi Motherboard Socket AM5 AMD B850 Micro-ATX DDR5, photo 4
ASUS PRIME B850M-A WiFi Motherboard Socket AM5 AMD B850 Micro-ATX DDR5, photo 5
ASUS PRIME B850M-A WiFi Motherboard Socket AM5 AMD B850 Micro-ATX DDR5, photo 6
ASUS PRIME B850M-A WiFi Motherboard Socket AM5 AMD B850 Micro-ATX DDR5, photo 7
ASUS

ASUS PRIME B850M-A WiFi Motherboard Socket AM5 AMD B850 Micro-ATX DDR5

SKU HC-324253MPN 90MB1LN0-M0EAY0

  • AM5
  • B850
  • Micro-ATX

Highlights

  • AMD AM5 socket with B850 chipset for Ryzen 7000/8000/9000 CPUs
  • Micro-ATX form factor with 8+2+1 power stages
  • Four DIMM slots supporting up to 256 GB DDR5-8000 (OC)
  • One PCIe 5.0 x16 slot and one PCIe 5.0 M.2 slot
  • Two additional PCIe 4.0 M.2 slots and four SATA 6G ports
  • Wi-Fi 6E, Bluetooth 5.3, and 2.5 Gbps LAN

Key specs

Socket
AM5
Chipset
B850
Form factor
Micro-ATX
Memory
DDR5
Wi-Fi
Yes
Power Stages (VRMs)
8+2+1
All specifications
$129.99
  • ≈ 0.001685 BTC
  • ≈ 0.05677 ETH
  • ≈ 130.12 USDT

In stock Ships by Tue, Nov 10 when paid today.

  • Delivery to the United States: $39.90 DHL Express Worldwide · arrives Wed, Nov 11 – Mon, Nov 16 if paid today
  • Rate locked at checkout Up to 60 min to send BTC, 30 min for ETH and USDT
  • New, sealed and genuine Full manufacturer warranty
  • 30-day returns Unused items in original packaging
Pay with BTCETHUSDTTRC20USDTERC20

Overview

A Micro-ATX motherboard built for AMD Ryzen 7000, 8000, and 9000 series processors. It delivers PCIe 5.0 connectivity for graphics and storage, high-speed DDR5 memory support, and integrated Wi-Fi 6E.

Design and Power Delivery

The board uses a Micro-ATX layout with a 6-layer PCB and a built-in I/O shield. An 8+2+1 power stage design supplies stable voltage to the CPU, while VRM and M.2 heatsinks manage thermals during heavy loads.

Memory and Expansion

Four UDIMM slots accept up to 256 GB of DDR5 memory with AMD EXPO profiles up to 8000 MT/s. Expansion includes one PCIe 5.0 x16 slot, one PCIe 4.0 x4 slot, and one PCIe 4.0 x1 slot for add-in cards.

Storage and Connectivity

Three M.2 sockets provide one PCIe 5.0 x4 and two PCIe 4.0 x4 interfaces alongside four SATA 6G ports. Rear I/O offers four USB 3.2 Type-A, four USB 2.0, three USB-C ports, DisplayPort, HDMI, 2.5 Gbps LAN, and audio jacks.

Cooling and Internal Headers

Six 4-pin PWM fan headers support system cooling. Internal headers include one USB 3.2 Gen 2 Type-C, one USB 3.2 Gen 1 Type-A, two USB 2.0 headers, three addressable RGB headers, front-panel audio, and an SPI TPM header.

PRIME B850M-A WiFi Motherboard Socket AM5 AMD B850 Micro-ATX DDR5 specifications

General
BrandASUS
Manufacturer part no.90MB1LN0-M0EAY0
EAN4711636051125
Form Factor
Motherboard Form FactorMicro-ATX
CPU
CPU ManufacturerAMD
CPU SocketAM5
Power Specifications
Power Stages (VRMs)8+2+1
Motherboard
BIOS Flashback ButtonYes
Clear CMOS ButtonNo
Motherboard ChipsetAMD B850
Dual BIOSNo
Built-In I/O ShieldYes
PCB Layers6
Memory
Max. Memory256 GB
Memory TypeDDR5
Memory Form FactorDIMM
System Memory SubtypeUDIMM
Max. Memory Speed (OC)8000 MT/s
ECC SupportYes
Memory slots4x
Performance ProfileAMD EXPO
Wi-Fi & LAN
LANYes
LAN Ports1x 2.5 Gbit/s
Wi-Fi / BluetoothYes
Wi-Fi StandardWi-Fi 6E
Bluetooth Standard5.3
Cooling
BackplateNo
M.2 HeatsinksYes
VRM HeatsinksYes
Internal Ports
CPU Power Supply1x 4-Pin + 1x 8-Pin
USB 3.0 / 3.1 / 3.2 (internal) Type C Header1
USB 3.0 / 3.1 / 3.2 (internal) Type C Possible Ports1
USB 3.0 (internal) Header1
USB 3.0 (internal) Possible Ports2
USB 2.0 (internal) Header2
USB 2.0 (internal) Possible Ports4
RGB / LED connectors3x Digital RGB (3-Pin 5VDG)
Front Panel Audio HeaderYes
SPI TPM HeaderYes
External Ports
USB 3.2 (external) Type A4
USB 2.0 (external) Type A4
Display ConnectorsDisplayPort (2x), HDMI (1x)
Audio outputs3.5 mm jack (total) 3x
Storage Ports
M.2 PCIe 4.0 x42
M.2 PCIe 5.0 x41
SATA 6G (internal)4
Expansion Slots
PCIe x16 slots (total)3
PCIe 5.0 x16 mechanical slot1
PCIe 4.0 x4 mechanical slot1
PCIe 4.0 x1 mechanical slot1
Fan Header
4 Pin Fan Connectors6
Display
Display IncludedNo
Back Connect
Back ConnectNo
Water Cooling
WatercoolingNo
Lighting
Lighting / RGBNo
Color
Primary ColorBlack

Specifications come from the manufacturer and can change without notice. Check the box contents and compatibility before ordering; our team answers questions within one business day.

Shipping & returns

Delivery to the United States: $39.90DHL Express Worldwide · arrives Wed, Nov 11 – Mon, Nov 16 if paid today

Ships from our warehouse in Germany: in stock, it leaves within 1–2 business days, tracked to the door.
ToBusiness daysThis item
GermanyDHL Paket1–2$5.90
Other EU countriesDHL Parcel International2–8$11.90–$15.90
UK, Switzerland and NorwayDHL Parcel International3–7$24.90
United States and CanadaDHL Express Worldwide2–5$39.90
Asia and the Middle EastDHL Express Worldwide2–5$49.90
Australia and New ZealandDHL Express Worldwide3–6$59.90
  • Discreet packaging Plain, unbranded box — no crypto or brand references outside
  • Returns 30 days for unused items in original packaging; faulty items are on us
Rates and delivery times by country

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