Crossfiring = Worse Performance?

[Jace]

I just thought that I should bring to your attention a recent "hitch" I've encountered. I recently acquired a second Radeon 5750 card and have started to run it in a crossfire configuration with another 5750. Before I did this, Amnesia ran smoothly and had no problems. But after this, I keep getting these pauses every 30 seconds or so where the game would just pause (just the game itself, audio still works kind of) for half a second and than continue. Than with the audio itself, I can hear "breaks" in it where the loop would just suddenly stop and than start again also in a half-second interval.

While this isn't really a problem per say since I can turn off Crossfire and the problems go away I just thought I should bring this the developer's attention. In case its needed, my system specs are below. Great game by the way.

AMD Phenom II 3.0Ghz Quad
Radeon 5750 1GB Crossfire configuration
8GB DDR3 Ram