Key Features
- Micro ATX Form Factor
- AMD B850 Chipset
- Socket AM5
- DDR5 (Max: 256GB / 4 slots)
- 3 x M.2 & 8 x USB & 4 x SATA
- HDMI and Display Port
Shipping & Delivery
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Standard Delivery
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5-7 Working Days
From £4.99
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ASRock B850M Pro-A Micro ATX Motherboard for AMD AM5 CPUs
£121.82 Original price was: £121.82.£112.80Current price is: £112.80. INC VAT
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In stock
You Save: £9.02 (7%)
Key Features
- Micro ATX Form Factor
- AMD B850 Chipset
- Socket AM5
- DDR5 (Max: 256GB / 4 slots)
- 3 x M.2 & 8 x USB & 4 x SATA
- HDMI and Display Port
Shipping & Delivery
-
Standard Delivery
Our courier will deliver to the specified address
5-7 Working Days
From £4.99
-
Express Delivery
DHL courier will deliver to the specified address
2-3 Working Days
From £9.99
-
Free 30-Day returns
Description
ASRock B850M Pro-A Power-Packed Durability for Modern Builds

Optimized for Performance and Compatibility
The ASRock B850M Pro-A is engineered to support the latest AMD Ryzen 9000, 8000, and 7000 Series processors with the AM5 socket, giving builders future-ready CPU compatibility. Its 8+2+1 phase power design with premium Dr.MOS ensures clean, stable power delivery—crucial for multitasking, gaming, and creative workloads. It features support for up to 256GB of ultra-fast DDR5 memory up to 8000+ MHz (OC), making it a strong foundation for high-speed computing performance.

Comprehensive Expansion and Storage Options
This Micro-ATX motherboard offers a wealth of expansion flexibility, including a PCIe 5.0 x16 slot for next-gen graphics cards, a PCIe 4.0 x4 slot, and a dedicated M.2 Key E slot for WiFi modules. With a trio of M.2 slots—one Gen5x4 and two Gen4x4—you get blazing-fast NVMe storage capabilities, while four SATA3 ports allow additional legacy drives. For everyday use or content creation, this board supports RAID configurations (0, 1, and 10), letting users secure and accelerate data access.

Modern Connectivity with RGB Aesthetics
Onboard features include Realtek 2.5 Gigabit LAN for high-speed networking and Realtek ALC897 7.1 CH HD Audio enhanced with Nahimic software for immersive sound quality. The rear I/O and front panel provide a mix of USB 3.2 Gen2, Gen1, and USB-C ports for maximum peripheral compatibility. With native HDMI and DisplayPort outputs, Polychrome RGB headers, and SignalRGB support, the B850M Pro-A blends practical features with visual flair. BIOS Flashback and Auto Driver Installer streamline setup, making this motherboard ideal for smooth and stylish system builds.
| Specifications | Details |
|---|---|
| Motherboard Type | Desktop |
| Form Factor | Micro ATX |
| Socket | AMD AM5 |
| Chipset | AMD B850 |
| Memory | 4 x DDR5 DIMM, Dual Channel, up to 8000+ MHz (OC) |
| Max Memory | 256GB |
| Graphics Output | 1 x HDMI, 1 x Display Port |
| Expansion Slots | Ryzen 9000/7000: 1 x PCIe 5.0 x16, 1 x PCIe 4.0 x4 Ryzen 8000: 1 x PCIe 4.0 x8/x4, 1 x PCIe 4.0 x4 |
| Storage | 4 x SATA III 3 x M.2: Ryzen 9000/7000: 1 x PCIe 5.0 x4 Ryzen 8000: 1 x PCIe 4.0 x4 B850 Chipset: 2 x PCIe 4.0 x4/x2 |
| RAID Support | RAID 0, 1, 10 (SATA & M.2 NVMe*) *Requires M.2 expansion cards for RAID 10 |
| LAN | Realtek 2.5G LAN |
| Audio | Realtek ALC897, 7.1 CH HD |
| Rear I/O Ports | 1 x HDMI, 1 x Display Port 1.4 1 x USB 3.2 Gen2 Type-A 1 x USB 3.2 Gen2 Type-C 2 x USB 3.2 Gen1 4 x USB 2.0 1 x RJ-45 LAN BIOS Flashback Button, Audio Jacks |
| Front Panel I/O | 1 x USB 3.2 Gen1 Type-C 4 x USB 3.2 Gen1 Type-A 4 x USB 2.0 |
| Internal Connectors | 2 x USB 2.0, 2 x USB 3.2 Gen1 1 x SPI TPM, RGB & Addressable RGB Headers 2 x CPU Fan, 3 x Chassis Fan 24-pin ATX, 8-pin + 4-pin 12V |
| Accessories | I/O Shield, 2 x SATA Cables, M.2 Screw |
| Warranty | 3 Year Replacement Warranty |
| Weight | 1.2 kg |
