Found this on another forum: http://img507.imageshack.us/img507/5333/p1000188zb5pe9yh0.jpg Pencil mod for the sapphire 4850 dual slot non reference card. Just applied it and it's running at 1.36v. Might be a bit high for 24/7 but I have no experience with it. It's currently running at 785mhz but I think I can push it a lot higher. EDIT: Even at this voltage 785mhz is the max I can do. Guess I have a bad card or something, anything over this speed generates artifacts at atitool. It can't be the temps because I'm using a Thermalright HR-03 GT with a 92mm Zalman fan at max speed which gives me a max temperature of 56 degrees C.