I read where other users have higher heat readings and don't have lockup problems. I have an Athlon 2000XP with a k7s5a mobo, radeon 9000 pro card, 450 watt power supply, 2 cd drives, 2 hd's. My processor temp is 52 C as I write this (with an open case), case is 25 C. My computor locks frequently when using more graphics intensive games or even graphics oriented screensavers (?). It seems that the games will run for a while and then lock when the system warms up. If I run the covers on the case, it happens even more frequently. I have a fan on the front of my case pullng air in, 2 fans on the rear blowing air out, a fan blowing on the cpu, and two fans on my power supply. My temps are on the higher end of users, but I haven't read where others are having lockup problems with these temps. I know that I can get better cooling options (for a price), but I am curious why my system is this unstable when it is not close to the die temp for the processor.