Most likely not. In well-optimized games that run on Dual Core processors, G3258 won't bottleneck your Graphics card. But with G3258 some games might not even run (Far Cry 4, to name one). For extra safety, overclock the processor to at least 4.2 GHz if possible, it's very simple and you'll get even more FPS. The combo itself is very good and with DirectX12 Support, you'll be covered, but again, games might not have DC support.