have you tried HWMonitor? Also, try CPU-Z and see what voltage you are getting. although they are both made by the same people CPU-Z is "faster" at seeing the voltage.
Speedfan is nice: http://www.almico.com/speedfan.php
It also monitors voltages, fan speeds, and you can check HDD health with its S.M.A.R.T. utility. When minimized, it can be set to display your temp in the taskbar (at least the temp of one core.)