Quote Originally Posted by Chazlene View Post
Is there anything else at all I could try before taking off the heatsink? I want that to be a last resort really...

And what the hell is new TIM Kiliv lol?
Thermal insulation material.

The fact that this happened after you moved your PC points strongly towards the fact that your heatsink has become loose or something. There's nothing else that could have caused this, unless the fan has stopped working (I assume you checked this).