I'v been building & upgrading computers for 23 years now I just built my latest P.C. Anyway when I bought this motherboard (Asus P9X79 Pro) I thought that UEFI meant just some kind of different interface for the bios, after researching I see its a whole new ballgame. I installed win7 64bit on my ssd with no problem but now that I found out about UEFI I checked my win7 64bit and it is installed on MBR so I am using The old bios method. problem is the whole time I had UEFI turned on in the bios. Could this cause problems? or BSOD's? I since have turned off UEFI.