Hmonitor springs to mind that measures CPU, MB and HDD temps and some fan stuff I think. However, there is a problem with socket 745 mb's and correct temperatures. Maybe some new BIOS will fix it but I am too lazy to update mine.
The MAX Temp for an AMD64/FX is 75C afaik. Mine seems to run idle at 60 which is stupid since my case is very well ventilated and is caused thus by the bios error or smth