Excuse the messiness of this post guys, just thought I'd post a few quick benches for you to have a gander at.
Heaven benchmark, default settings, 1900 x 1200
Furmark - 1900 x 1200, 32xAA, ran 7 minutes, auto fan speed, temps peaked at 90c
Note, the fan only ramped to 68% when temps peaked at 90c (top right of pic), I thought it would have been more than that? Surprisingly though it's a lot quieter than my 280's fan when running at the same rpm and no louder than my case fans.
Furmark - 1900 x 1200, 32xAA, ran 8 minutes, fan manually set to 100%, temps peaked at 67c
Definitely too loud for my (or anyones) liking when set to 100%, still nice to see temps never peak above 67c though. Personally I think 75% will be the sweet spot for keeping noise and temps well within check.
3D MARK VANTAGE - 21328
http://service.futuremark.com/compare?3dmv=2098968
5870 in the same system scored 18547
GTA 4 - 1900 X 1200, all settings maxed.
Statistics
Average FPS: 62.91
Duration: 37.30 sec
CPU Usage: 61%
System memory usage: 69%
Video memory usage: 93%
Graphics Settings
Video Mode: 1920 x 1200 (60 Hz)
Texture Quality: High
Shadow Quality: Very High
Reflection Resolution: Very High
Water Quality: Very High
Texture Filter Quality: Anisotropic x16
Night Shadows: Very High
View Distance: 100
Detail Distance: 100
Hardware
Microsoft Windows 7 Ultimate
Video Adapter: NVIDIA GeForce GTX 480
Video Driver version: 197.41
Audio Adapter: Speakers (Creative SB X-Fi)
Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz
File ID: Benchmark.cli
Assassins Creed 2 - 1900 X 1200, 4x AA, all settings maxed, vsync enabled, benched for 5 minutes whilst free running/causing mayhem around the city.
2010-04-16 23:11:36 - AssassinsCreedIIGame
Frames: 17887 - Time: 300787ms - Avg: 59.467 - Min: 52 - Max: 60
^^ Other than the framerate dropping to 52 for a brief second the card held a constant 60fps. Well impressed.
Assassins Creed 2 at same settings as above but with vsync disabled. Seems the framerate is locked at 60.
2010-04-16 23:36:24 - AssassinsCreedIIGame
Frames: 17466 - Time: 291144ms - Avg: 59.990 - Min: 59 - Max: 60
BAD COMPANY 2 - DX 9, Africa Harbor, 10 V's 10, 7 minutes played - 1900 x 1200, all maxed except bloom and HSAO.
2010-04-17 01:21:36 - BFBC2Game
Frames: 51173 - Time: 386420ms - Avg: 132.428 - Min: 69 - Max: 200
BAD COMPANY 2 -DX 10, Nelson Bay, 10 V's 10, 14 minutes played - 1900 x 1200, 8xAA, all maxed except bloom and HSAO.
2010-04-17 01:56:03 - BFBC2Game
Frames: 95226 - Time: 846451ms - Avg: 112.500 - Min: 48 - Max: 177
Note some tests state my cpu is running at 4GHz, or in gta's case, 2.66GHz, I think that's because they're not reading the 21 multi as I have turbo boost turned on, cpu is actually running at 4.2GHz.
I'll post some more + clocking results when I've finished having a play.