I find that my M.2 SSD (with Win 11 IoT Enterprise LTSC) is weirdly slower at booting up than my SATA SSD (Win 10 Pro) was. I’m not sure why, since the hard drive itself should be faster. BIOS itself seems to be slower.
I also can’t currently get it to even start if I have a hard drive plugged into the power supply and any of the SATA slots on the motherboard. IDK why. It reads the hard drives when I have them plugged in to an external bay and connected with a USB cable. It’s super-frustrating. I’ll try a SATA SSD and see if I have the same problem. If so, then I guess I’m stuck using M.2 drives. :(
You may have an issue with the boot order in your bios. Might be worth looking into. Your bios may try to boot from every other device connected to it before it tries the M2 SSD.
There’s literally nothing else connected to it though; no USB drives, no other hard drives, etc. When I tried to plug in my old 2tb 7200rpm drives from my last computer, it wouldn’t even power on to boot up.