MoboDocsSpecifications & model notes
- Form factor
- Micro ATX
- Memory slots
- 4
- M.2 storage slots
- 2
- SATA ports
- 4
Physical connector counts do not guarantee simultaneous use. Check processor and lane-sharing limits in the specification.
M2_1 accepts PCIe storage; M2_2 is SATA-only. M2_2 and SATA3_3 share lanes, so using either disables the other. This entry covers the original Pro4, not Pro4 R2.0 or Pro4-F.
Original documentation
Helpful starting points
Each guide states its scope. General checklists are not hardware tests of this particular model.
ASRock B450M Pro4: NVMe SSD not detected in M2_2
Check the original B450M Pro4 SATA-only M2_2 socket and SATA3_3 sharing before replacing an undetected NVMe or SATA M.2 SSD.
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.