friend of mine is upgrading his GPU, from a gtx560 to a gtx970
MSI 990xa GD5
Phenom II X6 CPU (exact model unknown)
Cooler master v750 psu
when he booted, all he got was a _ in the top left of the screen and "B2" in the bottom right.
I told him to swap his old card back in, and update the BIOS and retry. if that doesnt work, it might be a PSU issue?