Key Features
- Form Factor: mATX
- Socket: AM5
- Memory: DDR5
- Storage: 2 x M.2
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
Asus PRIME B850M-K Micro ATX Motherboard for AMD B850 CPUs
£132.64 Original price was: £132.64.£122.81Current price is: £122.81. INC VAT
Out of stock
Out of stock
You Save: £9.83 (7%)
Key Features
- Form Factor: mATX
- Socket: AM5
- Memory: DDR5
- Storage: 2 x M.2
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
ASUS PRIME B850M‑K – Smart Micro ATX Powerhouse for AMD Ryzen 9000 Series
Performance‑Tuned Power Delivery
The ASUS PRIME B850M‑K motherboard brings elite AMD Ryzen™ 9000 series performance to a compact Micro ATX form factor. Featuring an 8+2+1 phase digital power design with discrete MOSFETs and Digi+ VRM control, it delivers rock‑steady current and thermal efficiency for demanding workloads. A six‑layer PCB and robust heatsinks maximize overclocking headroom, ensuring your processor runs cooler and faster under any load.
Efficient Cooling and Long-Term Reliability
The ASUS PRIME B850M-K is engineered to maintain consistent performance and durability through intelligent thermal design and premium component quality. Multiple fan headers with hybrid control, along with dedicated M.2 and VRM heatsinks, ensure optimal cooling even during extended workloads or gaming marathons. ASUS’s renowned 5X Protection III safeguards — including overvoltage protection, stainless-steel back I/O, and LANGuard — enhance hardware longevity and stability. Combined with intuitive ASUS AI features like AI Cooling and AI Networking, the PRIME B850M-K stands as a future-ready foundation that balances power, precision, and reliability for modern AMD builds.
Advanced Connectivity & DIY‑Friendly Features
Equipped with PCIe 5.0 readiness, dual M.2 slots (including one PCIe 5.0 x4 slot), Realtek 2.5Gb Ethernet, HDMI, DisplayPort, and high‑speed USB (rear 10Gbps Type‑A and front 5Gbps Type‑C), the PRIME B850M‑K offers comprehensive I/O for gaming, content creation, and AI‑driven tasks. Aura Sync RGB, BIOS FlashBack™, and Q‑LED Core simplify customization and troubleshooting, making DIY builds faster, easier, and more reliable.
| SPECIFICATIONS | |
|---|---|
| Motherboard Type | Desktop |
| Form Factor | Micro ATX |
| Socket | AMD AM5 |
| Chipset | AMD B850 |
| RAM Technology | DDR5 (Dual Channel), ECC & Non‑ECC, Supports EXPO™ & AEMP |
| RAM Slots | 2 x DIMM |
| Max Memory | 128GB |
| Graphics Ports | HDMI, DisplayPort |
| PCI Express | 1 x PCIe 5.0 x16 |
| Storage | 4 x SATA III, 2 x M.2 (PCIe 5.0 & PCIe 4.0) |
| LAN | Realtek 2.5Gb Ethernet |
| USB Ports | Rear: USB 10Gbps Type‑A (2); Front: USB 5Gbps Type‑C (1) |
| Audio | Realtek 7.1 Surround HD Audio, Nahimic Audio |
| BIOS & Tools | UEFI BIOS, BIOS FlashBack™, ASUS AI Advisor |
| RGB Lighting | Aura Sync, Addressable Gen2 Headers |
| DIY Features | Q‑LED Core, SafeSlot, Pre‑mounted I/O Shield |
| Warranty | 3 Years |



