Add some GTX460 results too, all done at 1920x1080, max settings and 4XAA.

AVP:2010
265.90 - AVG FPS=45.7
263.14 - AVG FPS=45.6

Stalker CoP:

265.90
Day - 21.1/40.1/58.7
Night - 23.5/36.8/56.7
Rain - 24.5/38.6/59.1
Sun Shafts - 21.3/29.4/42.5

263.14
Day - 28.6/39.5/58.1
Night - 24.4/36.8/57.0
Rain - 26.0/38.1/57.3
Sun Shafts - 21.4/29.4/41.6

Dirt2: Not identical benchmarks as usual, but GPU usage did look a little higher in 265.90 anyway, this game did have the lowest GPU usage of everything i've tested.
265.90- avg-62.7 min-49.8
263.14- avg-57.3 min-45.9

SFIV:
265.90 - 8350 (99.16 FPS)
263.14 - 8336 (98.89 FPS)

Lost Planet 2 DX11 Test A:
265.90- Scene1-45.8 Scene2-39.3 Scene3-52.5 - AVG:45.8
263.14- Scene1-44.7 Scene2-41.1 Scene3-55.6 - AVG:47.1

Just Cause 2
265.90 - AVG-31.65
263.14 - AVG-30.61

Fear
Yes, its old, but ran it as a laugh, and cause i bought it again the other day.

265.90 - Min 11 Average 154 Maximum 370
263.14 - Min 83 Average 161 Maximum 371

Noticed that the AMD HK2207 DX11 Bullet physics demo works fine, albeit slow on 265.90, but doesn't start on 263.14, throws up "ERROR: Authenticity key invalid or expired. Engine start aborted!"

BFBC2 has 98-99% GPU usage in SP, don't play MP myself so wouldn't know where to look for the places that are supposed to have issues.

Every game other than SFIV and Dirt2 had 95-99% GPU usage, SFIV is forgiveable as it hardly ever goes under 100fps, but Dirt2 drops down to 60-70% usage, and framerate drops to late 40s.

Wish i had done this with older drivers, makes it easier to look back accurately, will also go through a few games of PES11 and Fifa11 to see how performance is on them.