Hail, i have always used Ati Tool or RivaTuner for overclocking my VGA, because i have always need a program for oveclocking only. Now i just start to use ATT, and i see that use different method for overlcloking. The ATI Overdrive 3, that i think is the "famous" driver overclocking level, and the manual overclock method. ATI overdrive 3 method is easier and i can controll the 3D profile only that change automatically whit a 3D application; the manual method have more option like fan e voltage controll. I have a Radeon X1800XT. What method you suggest me how the best for overclock my VGA? And if i want to overclok a HD4850..what is the best method? Bye and thanks.