i have a MSI HD 5850 OC, and i want to up its core voltage to 1.15v for overclocking. i've tried it with MSI afterburner, but it has a nasty tendency to fluctuate between 2D and 3D clocks while gaming. i'm worried that this would damage the card; having it jump between 157/300/.95v and 850/1200/1.15v simply doesn't sound healthy. so, i'm wondering if i can mod the bios to get 1.15v, and then using ATT to control the card's power state. currently ATT does not allow for custom voltages; every time i try to use one, the card automatically jumps back to its default settings. maybe if i add 1.15v into the BIOS, ATT will allow me to use it.