Just to throw a wrench in it...
While I was playing FryCry (video game) my computer went up into temperatures around 120 F at which the game stopped. This was a power supply problem (found out later) but when I checked the temp. only a few seconds later it was reading 98 F.
The temperature dropped 20 degrees in the matter of seconds which clued me to the power supply. My power supply was reading 13.8 vdc at idle, which is bad, but when my video card needed more power it responded with more.
You get the picture. With more power my computer went into melt down no matter how many fans I had in the case.
Point of the story...check your voltages!
There are several programs out there to do just that and most are free.
Let us know,
Your Hardware Guide.