New PC sometimes posts, sometimes doesnt

[Valked_]

I just built a new PC, everything posted first time, but had issues with my BIOS recognizing my two M.2 drives. I tried a few things but what ended up kind of working was taking one of them out, enabling safe boot with the setting “Windows UEFI”, and enabling CPM. While I was testing this I noticed that enabling CPM (It defaulted to “Legacy” and not “UEFI”, but I left it as is because I wasn’t sure which to use) caused it to not post, and a white LED turned on on my motherboard, I read online that could be the VGA light, and the only way I was able to fix it was resetting the CMOS. I finally was able to boot into Windows after a few tries, but after restarting my PC, same thing, white light on, no post. I had to reset the BIOS again, and enabled the same settings, to get back into Windows, on some restarts it’ll post, but sometimes it does the same thing, white led, no post. I’ve been tweaking bios settings and resetting the bios for hours now. Any idea how I could fix this?

(Note: When I first booted the PC / every time I reset the CMOS I get an error about cpu fan speed, my heatsink fans are all spinning and my CPU is running pretty cool, but I’ve just been setting it to “ignore” in the BIOS. Could this be part of the problem?)

 

CPU - Ryzen 7 7800X3D

CPU Cooler - Thermalright Pearless Assasin 120E

MOBO - ASUS TUF GAMING B650-E WIFI

RAM - Corsair Vengeance RGB 32GB

M.2 - Crucial P3 Plus 1TB

GPU - ASUS PRIME OC RTX 5070

PSU - CORSAIR RM850x