I first went to 2.1 ghz *the other default setting along with 1.6 for my board p4t533-c* and went through pc and 3d mark tests.. everything seemed fine so i put on some liquid thermal stuff and put her to the limit *150/38 is the highest setting the mboard will allow* that put it to 2.4 .. i read in an article http://www.pcstats.com/articleview.c...id=1130&page=1 that at 2.4 stability problems would be encountered and i would need to increase voltage to 1.65.. i never experienced the problems so kept it at 1.5.. now off to video card adventures..