F.E.A.R.
We've used FRAPS to play through a sequence in F.E.A.R. in the past, but this time around, we're using the game's built-in "test settings" benchmark for a quick, repeatable comparison.

Probably the first thing you'll notice about these results is the trouble that the three CrossFire configs have running this game. Their minimum frame rates are relatively low, and the X1900 XT CrossFire rig gets the worst of it, perhaps because it has less memory than the other two. This must be the product of some sort of driver bug. Whatever the case, I'd disable CrossFire for running F.E.A.R. unless and until ATI produces a fix.

Notice, also, that the Radeon X1900 XT 256MB's higher average frame rates here don't seem to count for much. At higher resolutions, that card's minimum frame rate matches the 7950 GT's.

F.E.A.R.'s developers did a nice job with their "test settings" sequence. The game seems to run fine in many areas at 1600x1200 with Max Quality settings on the 7950 GT and X1900 XT 256MB, but you'll run into areas on both cards where things slow down, as reflected in the median low frame rate numbers above. I'd recommend playing at a lower resolution or quality level on these cards.