4890 cf not working

[username1107]

hi i have two 4890 on crossfire when i was playing call of duty the screen want black screen. The card work fine by them self it just when thay are in crossfire the screen go black. I got Catalyst 10.5 drives,I have try run my computer on a 1000w power to see i need more power that did not work.
Here is my pc
Intel i7 920 @2.67
asus pt6 se
ait 4890 x2
ocz 60gb ssd
ocz 9gb 1333 ram
wd 2t black hhd
pioner blue ray burner
antce 1200 case with 4 more fans

 

[JLuchinski]

Maybe your PCI slot burnt out? Bad Crossfire Bridge? Have you tried older drivers? So you did try each card by itself?

 

[username1107]

fix it i had the bridge in wrong my bad lol

 

[JLuchinski]

Good to hear, glad you got it fixed. It's always the thing you least suspect.