I have a 9800 gx2 which i've always been having terrible performance in certain games (UT3, Oblivion, etc.) while others, COD4, Fall Out 3, Grid, I get perfect 60 fps. I don't know what this is but it's getting annoying, I never get the fps' promised by the benchmarks everywhere. Also here is a benchmark I did
You'll notice I have my 9800 gx2 (the red) and compared it to another 9800 gx2 (blue) and the blue one almost doubles mine in performance on the top graph!? This bench only tested the card so I doubt it's my pc bottlenecking it, but the rest of my specs are:
6600 quad core 2.4
4 gigs ram
350 sata HDD
Need more info let me know...