Input lag is the other major factor in games. The difference is very noticeable when you compare medium settings with locked 60 fps against ultra settings with unlocked 55-60 fps. Basically if you max out GPU utilization the input lag will increase dramatically, and that's why iGPUs feel so laggyFPS mean nothing if your frame times are poop. Quad cores struggle hard in newer titles at 1080p with low settings. GPU helps, but then you aren't getting the most out of your hardware, or your forced to play at higher resolutions making your CPU the bottleneck. Faster GPU only gets you so far.