Now that all the AMD people are here, I shall say my temps!
I'm using an Intel Pentium-III 1GHz @ 1.1GHz (1.7V @ 1.85V), 38C idle and arround 53C with SETI, Norton AntiVirus........ It goes 24 / 7 and never crash, apart from some reboots I do, due to new installed software.
The most importnat of all is that in my box there is only one cooler and that is the Intel CPU cooler! No "huge" PSU, no noise!
MB : Abit VP6
CPU: Intel Pentium-III 1GHz
OS: Windows XP Pro