Now, the PC will only boot into BIOS (I'm guessing it is waiting for me to re-select RAID instead of AHCI?).
Several months ago, I purchased this TUF full tower PC off Craigslist.
System specs:
ASUS Sabertooth X99
i7 5960x
2x GTX 1080 SLI
4x 16GB (64GB) G Skill Ripjaws 2133 (2400.xmp)...