[robg]

Here are the results of some quick testing with current Sapphire stock & Vapor-X Rev. 2 bios on my Sapphire 5870 with 2 monitors in extended mode.

Driver Packaging Version 8.71.3-100205a-095620E
2D Driver Version 8.01.01.1010
Direct3D Version 8.14.10.0735
OpenGL Version 6.14.10.9606
CCC Version 2010.0205.1306.23449

Two runs of the Heaven benchmark: 1920x1080, DX11, Shaders: High, Tessellation: enabled, Anisotropy: 4, AA: off, Full-screen: On
Stock Results: FPS: 37.4, Score: 941
Vapor-X Results: FPS: 38.3, Score: 965

Current Sapphire Stock Bios: VER012.014.000.005.035264
Clocks: 850/1200
Temp: 74 (High)
Activity: 99
Fan Speed: 30 (High)

Return to idle:
Clocks: 400/1200
Temp: 51 (Low)
Activity: 0
Fan Speed: 24 (Low)

Current Vapor-X Rev. 2 Bios: VER012.019.000.002.000000
Clocks: 875/1250
Temp: 61 (High)
Activity: 99
Fan Speed: 40 (High)

Return to idle:
Clocks: 400/1250
Temp: 44 (Low)
Activity: 0
Fan Speed: 26 (Low)

Return to idle: Single Monitor
Clocks: 157/300
Temp: 35 (Low)
Activity: 0
Fan Speed: 21 (Low)