Hello Robert Thanks for your reply, but the standard SuSE kernels are precompiled with APM support. The thing is, the kapmidled thread makes sure the kernel sends HLT instructions when the CPU is idle... that should keep it cool. I think the windows utility is doing something else, something athlon specific ("athlon forced cooling")... but I don't know what, and how to reproduce it on Linux... Anyhow, 55°C is too hot for an AMD CPU to be running... Kind regards Guy ---------------------------------- Hi, If I'm correct, you can re-compile your kernel with APM (Advanced Power Management) on and don't forget to switch the "Do CPU Idle calls" on. This should reduce your CPU temperature as sections of it switch off when they get idle calls. Can someone confirm this?