I've tried my XFX 7950 GX2 in both the Asus P5B-VM (0307 BIOS) and the Abit AB9 Pro (13 and 14 BIOS). However, if I have multi GPU enabled, any 3D program (3dmark06, HL2, COD2, One Ring Screen Saver, etc) will crash the PC either as soon as it does full screen, or not long after.
However if...