I am so happy to be able to post this. I have had my computer for about 4 months. My first cpu would only do 850mhz at 43C at idle. I bought a new case and built 3 more for friends. I switched one of the cpu's and got it to do 950 although i ran it at 900mhz. The cpu was much cooler in my fong fai 320 case. It ran at 39C at idle and 40-41 under load. I did notice that while booting it would hold for a second or two at the windows login screen until I moved the mouse back a forth a little. When I installed windows ME it was a a speed that was really too high for the earlier cpu that was in the computer. I think this might have added to the problem but everything seemed fine. Well I got a new IBM hard drive and reinstalled windows me. Guess what? There is no longer the pause at the start and now i boot right into windows at 1 gig with no problems at all. The cpu looks to be idling at 42C. I think that is not bad at all! I guess it goes to show that the operating system could be the cause of overclocking problems. I do not know what that pause was during the loading of windows but it affected my ability to overclock this duron 600. Does this temp seem pretty good to you guys?