Welcome to the forums, Scarier!
I'd definitely see what your GPU usage is during gaming. Viewing CPU usage, suggested above, probably won't be very accurate, because an 8-thread CPU will never have all threads at 100% in gaming even when it's completely overwhelmed by GPU data.
Just use MSI Afterburner to view your GPU usage. I'm guessing you won't be close to 100%, as a single GTX 770 could be bottlenecked in some situations on your CPU, and in fact could be bottlenecked on any CPU to a certain degree.