6950 to 6970 flash issue

[xacid]

I have a PowerColor 6950 reference card that I've had flashed to a 6970 for over a year or so more and it has worked flawlessly. Recently I picked up a new i5 3570k and msi 77a gd55 mobo. Toss it in and for some reason when its on the flashed bios it doesn't seem to want to work. Flip the switch back to the stock bios and it works fine. Tried a few different bios and only thing mod wise I can get to work is unlocked shaders but no overclocks or increase voltage.

Sig is current with system specs.