2GB RAM, ASUS A8N (nForce 4 chipset), 1152x864, HOT scrim, first 2 minutes following ronteco[SOW]. Measured with Fraps.

Maximum settings (4x FSAA):

AMD 64 3500+ (Venice, 2200 mhz),
GF 6800 Ultra (425/550):

Frames: 7263 - Time: 120000ms - Avg: 60.525 - Min: 23 - Max: 79
Frames: 7263 - Time: 120000ms - Avg: 60.525 - Min: 23 - Max: 79

AMD 64 (Venice, 1800 mhz = AMD 64 3000+ level),
GF 6800 Ultra (425/550):

Frames: 7357 - Time: 120000ms - Avg: 61.308 - Min: 24 - Max: 79

AMD 64 (Venice, 1400 mhz),
GF 6800 Ultra (425/550):

Frames: 5624 - Time: 120000ms - Avg: 46.867 - Min: 3 - Max: 68
Frames: 5841 - Time: 120000ms - Avg: 48.675 - Min: 11 - Max: 68

AMD 64 3500+ (Venice, 2200 mhz),
GPU: 355 core/500 RAM (GF 6800 GT level)

Frames: 6322 - Time: 120000ms - Avg: 52.683 - Min: 19 - Max: 69

AMD 64 3500+ (Venice, 2200 mhz),
GPU: 325 core/350 RAM (GF 6800 level with 16 pixelpiplens tho, instead of only 12):

Frames: 6639 - Time: 120000ms - Avg: 55.325 - Min: 11 - Max: 72
Frames: 6610 - Time: 120000ms - Avg: 55.083 - Min: 12 - Max: 72

 

Medium settings (default med. settings, no FSAA):

AMD 64 3500+ (Venice, 2200 mhz),
GF 6800 Ultra (425/550):

Frames: 10499 - Time: 120000ms - Avg: 87.492 - Min: 28 - Max: 100

AMD 64 (Venice, 1800 mhz = AMD 64 3000+ level),
GF 6800 Ultra (425/550):

Frames: 9054 - Time: 120000ms - Avg: 75.450 - Min: 27 - Max: 94

AMD 64 (Venice, 1400 mhz),
GF 6800 Ultra (425/550):

Frames: 7535 - Time: 120000ms - Avg: 62.792 - Min: 13 - Max: 86

 

Hidden Ultra Quality settings (4x FSAA)

AMD 64 3500+ (Venice, 2200 mhz),
GF 6800 Ultra (425/550):

Frames: 7572 - Time: 120000ms - Avg: 63.100 - Min: 24 - Max: 79