Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.
Work through these checks
0 of 3 complete01Move the SSD to the M.2 slot directly on the CPU (labeled CPU_M.2 or PCIe Gen4x4)
Move the SSD to the M.2 slot directly on the CPU (labeled CPU_M.2 or PCIe Gen4x4).
Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.
02Check the board manual which slots share the PCIe lines
Check the board manual which slots share the PCIe lines.
Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.
03Check the speed in CrystalDiskMark
Check the speed in CrystalDiskMark.
Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.
Possible causes
- The GPU in the primary slot takes the PCIe lines from the M.2 slot
- Chipset M.2 port limitation (PCH vs CPU lanes)
- Incorrect PCIe Bifurcation setting in BIOS
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