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ASUS documents PRIME B550M-K WIFI-CSM with AM4, AMD B550 Chipset, DDR4. It lists 2 DDR4 DIMM slots. The checked storage text identifies 2 M.2 slot IDs. Use the linked ASUS support list for the exact CPU, BIOS and memory kit; this record does not certify an unlisted combination.
Key specifications
| Socket | AM4 |
|---|---|
| Chipset | AMD B550 Chipset |
| Memory | DDR4 UDIMM, 2 DIMM slots |
| PCB revision | Not independently verified in this record |
| CPU-less BIOS update | Not verified |
Do not infer exact CPU support from the socket
The board’s CPU support list and minimum BIOS must be checked for each processor. This record does not invent missing BIOS versions.
CPU support
The manufacturer specification names Ryzen 5000 at series level. This does not establish support for an exact CPU SKU or BIOS. Search the exact CPU SKU in the board’s own support list for a boot verdict.
Check a CPU against this board
Memory and QVL
DDR4 UDIMM is the documented module generation and form. An exact kit QVL entry, tested module count and EXPO/XMP speed still need separate confirmation.
M.2 slot map
| Slot | Protocol | Length | PCIe | Condition |
|---|---|---|---|---|
| M2_1 | NVMe | 2280 | Configuration-dependent; see ASUS storage table | Check manual for additional conditions |
| M2_2 | NVMe | 2211, 2242, 2260, 2280 | 3.0 x4 | Check manual for additional conditions |
Fit, firmware detection and bootability are separate checks. Heatsink clearance has not been verified here.
Next checks
- Confirm the exact PCB revision on your board.
- Check the CPU support list and installed BIOS.
- Check the exact RAM kit SKU in the QVL.
- Match each SSD to a specific M.2 slot and review lane sharing.
Explore parts after verifying the specifications
Search results can include products that do not match your exact board, revision or slot. Check the SKU and manufacturer documentation before ordering.
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Search PRIME B550M-K WIFI-CSM on AmazonSources & verification
Manufacturer pages were checked on 2026-10-29. Recheck the current page before purchase.
- ASUS PRIME B550M-K WIFI-CSM technical specifications Checked 2026-10-29
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