Hi all. I just got my Asus P4B266-C with the 1.6a. I have been at 2133 with a fsb of 133. It used to be kinda flaky at this speed until I upped the voltage. Now it is rock stable. What I want to know is how much further should I go and what should I test it with to find out if it is stable.? Do I have to keep increasing the voltage? Is 1.55 too high of a voltage? Right now I have it at 2159 running Prime95 torture test. What would you guys do to get it up higher? Also what is the best temp monitoring programs I can use? For some reason my P4B266-C is stuck at 40c in the bios. I haven't checked it through windows yet. Ok please help a newbie attain at least 2.2. Thanks a million.