Edit: nevermind, wasn't the mobo's fault. One of my drives was dying and finally bit the bullet. I guess hardware fast boot was forcing it to boot up or something, not sure.
I found out the mobo killed it actually, crazy as that sounds. Tested another Spinpoint and had the same issue, but I saved the drive by removing it right afterwards because it takes a little while for it to brick the drive. Tested an old WD Raptor a...