Everyone doesnt flash their video card bios. They do it only IF they know for sure that their card will accept it. If you flash your video card with a bios that isnt specifically for your card, you could damage it....and without the original bios to re-apply...the card would be hooped. I would say that the easiest way is to use ATItool to overclock. I know that you said you tried, but i would fool around a bit more with that before you go flashing your video bios. I havent been able to find too much info on video card voltages and mem timings, but im pretty sure that you could modify both with your current card and Atitool. If it dosnt overclock well, then i doubt that flashing anything would help anyways.