It's hard to describe but when playing a game the fan will ramp up for a couple of seconds then it will calm down... 10 seconds later same thing. Rinse and repeat. And the temps graph literally looks like spikes. The temps shoot up, the fan ramps up, the temps go down immediately and then the fan slows down... and then the temps go up. Im using an aftermarket cooler and when installing it I did notice that I put a bit to much thermal paste but i really dont think it's that.