Crossfire causing stuttering in games

[shauncr91]

Recently built up a new PC with the following spec:

i5 2500k
Asus P8P67 LE
Crossfire HD 6870's
12GB RAM
Antec 650w
SSD for Windows, HDD's with games etc on.
Windows 7

When I enable crossfire I get a stuttering problem in games, it's like a repeating glitch every 1-2 seconds and not generally bad FPS, when I disable crossfire in CCC and just use one card the problem goes away.

Does anyone know how to fix this problem?

Thanks

 

[shauncr91]

Hmm so there's no real fix? Looks like I may have to try and send them back :/