Hi I just bought an EVGA GeForce GTX 770 Superclocked 2GB and have been getting low FPS in games I should be able to run with no problem, such as Crysis 2 for example on High Settings.
My CPU is an Intel Core i5 760 that I was able to overclock to 3.4 GHZ. So could that be it? Or could voltage be an issue
In addition your CPU ISN'T a bottleneck for your GPU by a long way.
You say low fps but how low? What are your expectations?