ocmkieboom

I am still pretty new to this all but i want to know is it possible to overclock a Mac Pro 3.1 (early 2008). I have 2 Intel Zeon E5462@2.8GHz but its a huge bottleneck for my GTX 980 TI. I am running windows 10 but i'm not sure if that is important. The temperatures are on full load not above the low 60's so i think an overclock should be possible. But is it possible with this machine?