I checked the CPU socket thoroughly and didnt find any bent pins. Ill look into the ram slot connectors next.i'd check the cpu socket for misaligned pins and check all ram slots connectors
are sprung and not flatten
Well, I tore apart my loop, fresh installed Windows 7 and reinstalled the old coolers and tested both cards. Both cards work perfectly fine on there own.BSOD in a 3D app usually means the video memory has an issue. Remove one card and test them one by one.