GPU Temps very high and fps drops dramatically every so often

Diktator

Honorable
Oct 25, 2013
56
0
10,630
GTX 760 is reaching 80 degrees during gaming, on bf4 for example at 80 degrees the GPU will drop to 25% load occasionally causing my frame rate to drop to 30 \40 when I was getting 60+ before, don't know why it drops the GPU load so frequently during games, I haven't really been cleaning the dust out! Could this be the cause?