the disk disappears in BIOS (unrecognized), after the computer goes to sleep or after a reboot almost every time, disappearing during a cold start is very rare that I ignore this problem
in my case there is no problem with speeds. when it detects it normally PCIe4x4, in CDM speeds Read 6800 to 6950 Write 6800-6900.in M2.1 Read 7250 to 738 Write 6800-6950disk disappears only after W11 sleep or after "restart"
