Crossfire bluescreen- need help! please!

[whatsup1396]

i recently bought a sapphire 4890 to go along with my 4870 in crossfire, they both use 1gb of ddr5 memory and i was very excited to try out all my games on max settings but then time after time i get a bluescreen and/or my system totally freezes and i cant ctrl + alt + del or anything. and this is with all gamesthat actually utilize crossfire, like call of duty 4, Shogun 2, ArmA 2, even games like counter strike source get a bluescreen, i would really appreciate it if you could help me on this matter- thanks

Specs:Intel core i7 920@
2.96ghz
Intel DX58S0 Extreme Mobo
4870 1gb + 4890 1gb
6gb of ddr3 ram@ 1333mhz
Seagate 1tb HDD 32mb cache @7200rpm
Corsair 750w PSU
Antec 900 case
Windows 7 64bit

PS. when i disables crossfire in Catalyst Control Center all my games then worked so i know its an issue of my two GPUs

 

[Maziar]

Take out the cards and test them simultaneously and check if you get any BSOD's with either of them or not