For the past few months now, my CPU has been randomly throttling itself by reducing the multiplier from x15 to x4, effectively making it run at a quarter of the speed.
I have not completed ruled out overheating as when this throttling occurs, any application that can show CPU temperatures shows it at either 255 degrees (CoreTemp) or -185 degrees (AMD OverDrive Thermal Margin).
I have tried disabling AMD Cool 'n' Quiet as that causes the multiplier to vary, although that did not help.
I am currently using:
AMD Phenom II X4 960T
nVidia GeForce 760T 4GB
Corsair 650W PSU
Any help in fixing this throttling issue would be greatly appreciated!