MoboDocsSpecifications & model notes
- Form factor
- Micro ATX
- Memory slots
- 4
- M.2 storage slots
- 1
- SATA ports
- 6
Physical connector counts do not guarantee simultaneous use. Check processor and lane-sharing limits in the specification.
The M.2 socket shares bandwidth with SATA6G_5 and SATA6G_6: both SATA ports are unavailable when an M.2 drive is installed. This is the II model, with four DDR4 memory slots; use its own BIOS and manual.
Original documentation
Helpful starting points
Each guide states its scope. General checklists are not hardware tests of this particular model.
ASUS PRIME B450M-A II: SATA 5/6 missing after M.2
Restore a SATA drive that disappears after installing M.2 on the PRIME B450M-A II by checking the shared SATA6G_5 and SATA6G_6 ports.
Connect your case’s front-panel cables
Identify the power switch, reset switch, and indicator LEDs using the correct header map.
Will an M.2 SSD disable another port?
Read slot-sharing notes before adding an SSD or expansion card.
How to find your motherboard model and revision
Read the board identity in Windows, then distinguish the product name, hardware revision and BIOS version.
Where to download motherboard drivers
Find chipset, network and audio drivers for the exact board and operating system, including a plan for a PC without internet.
Will this CPU work? Check the board and BIOS together
A matching socket is only the first check. Read the exact CPU support entry and required BIOS before replacing a processor.
Sources reviewed 2026-10-22 · Report a correction.