Severe Performance Decrease in CROSSFIRE...help

[bonoscot]

Hey guys...i have just installed my 6970s in crossfire mode.....

Installed drivers,enabled crossfire in ccc......my performance is horrific.

What have i done wrong?

eg.On a single card in BF3 i get 45 fps in ultra.......with crossfire i get 10.

on Need for speed shift(tried older game i get 90 fps but when i install crossfire i get 10 fps and cant run anything at all.

My desktop is slow etc

can anyone help me.


My system....

I7 860 2600
2x 6970s cards.
8GB ram.



thanks

[Abram]

What are your motherboard and PSU models?

[Haldi]

seems like a driver problem! What driver did you install ?

Or maybe some hardware problems with the PCI-E Slot

[bonoscot]

My system specs.....

Intel Core i7 860 @ 2.60
P7p55d le Motherboard
8gb Ram
HIS Ice q 6970 gfx card
Ati Amd Radeon 6970 card
1000wt Thermaltake Toughpower Modular PSU


Drivers up to date......crossfire enabled

[Abram]

Well you certainly have enough power, and I see no mobo BIOS updates that mention PCI-E or Crossfire..

Try the new card on its' own, and in each slot you're using. Uh, are you using the CAP profile for BF3? I don't really know if performance should be so poor if you are not using it, but I though I'd ask..