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ASUS documents Pro B860M-C-CSM with LGA1851, Intel ® B860 Chipset, DDR5. It lists 4 DDR5 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 | LGA1851 |
|---|---|
| Chipset | Intel ® B860 Chipset |
| Memory | DDR5 UDIMM, 4 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 checked product specification did not yield a reliable CPU-series list. Use the linked manufacturer CPU support page for an exact model. 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
DDR5 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 | 2242, 2260, 2280 | 5.0 x4 | Check manual for additional conditions |
| M2_2 | NVMe | 2242, 2260, 2280 | 4.0 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 Pro B860M-C-CSM on AmazonSources & verification
Manufacturer pages were checked on 2026-10-29. Recheck the current page before purchase.
- ASUS Pro B860M-C-CSM technical specifications Checked 2026-10-29
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