While working on Bill's Athlon 64, I discovered there are some things you can do for hot Athlon XPs. In the same SilentPC piece, but there are some utilities that allow an Athlon XP to actually halt when idle. Apparently Windows XP doesn't do this, so you need a special little utility to do it and hopefully reduce power since most of the time the system is waiting around for a keyboard input or something.
You need a couple of programs. One called vcool and another called coolbits apparently.
