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MOTHERBOARD · VERIFIED EXACT MOTHERBOARD
ASUS
PRIME B860M-A WIFI-CSM — 90MB1JY0-MVAAYC
The conservative exact-identity Intel micro-ATX option. Compare the I/O you will actually use against the storage-rich ASRock and full-size MSI alternatives.
Reference: Verified exact modelMPN: 90MB1JY0-MVAAYCSocket / chipset: LGA1851 · Intel B860Form factor: Micro-ATX · 244 × 244 mmMemory: 4 × DDR5 DIMM · up to 256 GB · XMP and AEMP IIIPower design: 7+1+1+1 · 80 A DrMOS stages
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Lowest verified price$239.99Exact MPN/SKU · Newegg Canada · CADIn stock
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Last checkedCurrentOct 6, 2026, 11:02 p.m. UTC
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VERIFIED MANUFACTURER MOTHERBOARD SHEET
Exact-model platform, expansion and limits
Confirmed facts
- MPN: 90MB1JY0-MVAAYC
- Socket / chipset: LGA1851 · Intel B860
- Form factor: Micro-ATX · 244 × 244 mm
- Memory: 4 × DDR5 DIMM · up to 256 GB · XMP and AEMP III
- Power design: 7+1+1+1 · 80 A DrMOS stages
- Expansion: PCIe 5.0 x16 · PCIe 4.0 x4 · PCIe 4.0 x1
- Storage: 2 × M.2 · Gen5 x4 plus Gen4 x4 · 4 × SATA
- Networking: Realtek 2.5 GbE · Wi-Fi 6E · Bluetooth 5.3
- Front connectivity: Rear USB-C 20 Gbps with DisplayPort Alt Mode · front USB-C 10 Gbps
- Audio: Realtek 7.1-channel codec
- CPU support: Intel Core Ultra Series 2 subject to the current support list and BIOS
Compatibility to confirm
Keep WIFI-CSM and 90MB1JY0-MVAAYC in the identity. Confirm LGA1851 CPU support and BIOS requirements; do not merge it with the non-Wi-Fi or non-CSM board.
A buyer who needs three or more M.2 drives, 5 GbE, Thunderbolt 4 or several high-bandwidth add-in cards.
Official manufacturer sources · checked August 19, 2026Official source 1 →Official source 2 →
Other useful details
The exact model, platform and retailer identity are tied to the same manufacturer record.
FAQ
Questions before buying this model
Who is the ASUS PRIME B860M-A WIFI-CSM — 90MB1JY0-MVAAYC best for?
A compact Core Ultra Series 2 system that needs two M.2 slots, rear 20 Gbps USB-C, front USB-C, Wi-Fi 6E and a documented Canadian part number.
Who should compare another option?
A buyer who needs three or more M.2 drives, 5 GbE, Thunderbolt 4 or several high-bandwidth add-in cards.
What should you compare before choosing?
The conservative exact-identity Intel micro-ATX option. Compare the I/O you will actually use against the storage-rich ASRock and full-size MSI alternatives.
What must be verified before buying?
Keep WIFI-CSM and 90MB1JY0-MVAAYC in the identity. Confirm LGA1851 CPU support and BIOS requirements; do not merge it with the non-Wi-Fi or non-CSM board.
A question about this product?
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Questions about the PRIME B860M-A WIFI-CSM
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