Here is a part of my CPU benchmark project. I made these charts to support my claim that K8 is not fast enough for XP gaming rig (even for old games like NFSU2). Just to be clear - for me fast enough = avg fps > 100 and minimum fps > 60. 😀

First batch of results was made using GeForce 7800 GS (16PP) overclocked to 500/1400 MHz. Drivers 275.33, winXP SP3. All game details at maximum, AA/AF disabled, 1024x768. For Athlon Thunderbird GF 6800 Ultra + FW 71.89 was used - 275.33 doesn't work properly on CPU without SSE.

Second part - this time I used GTX 285 with drivers 341.44 and windows 7 x64. All game details at maximum, AA disabled, 16xAF, 1280x1024.
Clearly with same CPU fps are worse. Most likely this is due to different driver core for GF7 and GF8+ architectures. GF7 driver overhead seems to be less significant, however the driver doesn't benefit from dual-core CPU. On the other hand GF8 and later are slower on single-core but scales very well with second CPU core.