The processor is adequate for gaming, not great, but it can run games.
The 660 is an aging card, the 760 is better, but not worth upgrading to. (something like the 970 or 390 would be a worthwhile upgrade.)
Overall, its an ok system, dont expect ultra settings, but it should run most newer games, and run older ones just fine.
Depending on your motherboard and PSU, I would invest in a good cooler (CryoRig H7) and OC that processor as much as possible.