Have you seen the option in the Bios called "Robust Graphics Booster" Its set on auto by default... but it has a Fast and Turbo setting. Anyone know anything about this?
The GIGABYTE Robust Graphics Booster (R.G.B.) feature boosts 3D graphics performance on all DirectX 8 and DirectX9 applications by optimizing GPU and Video memory performance to the max. All is needed is a few simple BIOS settings, and no need to install additional software
Sounds like it is a function by which the motherboard automatically overclocks the graphics cards on the fly. Personally i prefer to overclock cards through drivers or utilities such as atitool and rivatuner.