I've run BF2 on my m9700 with a single card, and it runs great at 1920 x 1200 on high settings with AA and AF off. Don't really need it at those resolutions.

I've overclocked my 7900gs's and listed it at futuremark.com. I wasn't able to push the main clock that high as I didn't overvolt the GPU slots like the Dell guys, but my memory speeds were higher than most of them report.

http://service.futuremark.com/compare?3dm05=2207214

If you have a Dell with a 7900gs, you should go to the Dell section as they have a couple strings on overvolting and overclocking and how to do it with the Dell if you're interested. Different mobos, drivers, and bios. They list all the software they use to strip and alter the V bios. I used nibitor.