I've had good luck with the "Everest" info tool... Gives you tons of info on hardware, including voltages, fan speeds and temperatures if your motherboard is so equipped. The only computers so far that I haven't been able to get fan speeds/temps from are Dells.

It's primarily a hardware profile tool, but also gives lots of info about the OS.

Last edited by noderaser; 05/23/09 04:04 AM.