

ASUS PRIME B850M-A-CSM
Key Features
- Socket
- AM5
- Chipset
- AMD B850
- Form Factor
- Micro-ATX
- Memory Type
- DDR5
- M.2 Slots
- 3 x M.2
Price comparison • £140.99 to £152.78 • See more in Motherboards
Price History
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Product Description
The ASUS PRIME B850M-A-CSM pairs the AM5 socket with the AMD B850 chipset, supporting current and next-gen Ryzen CPUs and unlocking a broad feature set for performance desktops. Its Micro-ATX form factor fits compact cases while still providing robust expansion, and DDR5 memory support ensures high bandwidth for demanding workloads. PCIe 5.0 as the primary interface delivers maximum throughput for the latest graphics cards and NVMe storage. Read More...
Three M.2 slots supporting one Gen5 and two Gen4 drives offer fast storage options for gaming or content creation. Four DIMM slots accommodate up to 256 GB of RAM, so memory capacity is never a limitation. Dual PCIe x16 slots enable flexible add-in card configurations, and 2.5 GbE networking suits high-speed local networks.
Product Information
| Product Name | ASUS PRIME B850M-A-CSM |
|---|---|
| Brand | ASUS |
| Model Number | PRIME B850M-A-CSM |
Product Features
| Socket | AM5 |
|---|---|
| Chipset | AMD B850 |
| Form Factor | Micro-ATX |
| Memory Type | DDR5 |
| Max Memory | 256 GB |
| Memory Slots | 4 x DIMM |
| Memory Speed Support | DDR5-8000+ (OC) |
| M.2 Slots | 3 x M.2 |
| M.2 Support | 1 x Gen5; 2 x Gen4 |
| SATA Ports | 4 x SATA |
| PCIE x16 Slots | 2 x PCIe x16 |
| Primary Pcie Version | PCIe 5.0 |
| Ethernet | 2.5 GbE |
| Rear USB | 2 x USB-A 10 Gbps; 2 x USB-A 5 Gbps; 4 x USB-A 2.0 |
| Internal USB Headers | 1 x USB-C 5 Gbps header; 2 x USB 2.0 headers |
| CPU Power | 1 x 8-pin EPS + 1 x 4-pin EPS |
| RGB Headers | 3 x ARGB |

