Here are a few benchmarks with your card. Your CPU won't be a bottleneck. It likely has turbo-boost bringing its in-game speeds up to high 2.x GHZ.
http://www.notebookcheck.net/Dragon-Age-Inquisition-Benchmarked.131101.0.html
Dragon Age Inquisition
1024*768 low - 51.2 fps
1366*768 medium - 35.7 fps
Assasin's Creed Unity
1024 * 768 low - 26.6 fps
http://www.notebookcheck.net/Far-Cry-4-Benchmarked.131069.0.html
Far Cry 4
1024*768 low - 49.3 fps
1366*768 medium - 33.2 FPS
And some other benchmarks.
http://www.notebookcheck.net/NVIDIA-GeForce-840M.105681.0.html







