My laptop usese Nvidia Optimus technology, with 2-gen core-i5 with integrated graphics and Nvidia Geforce 540M as deiscrete graphics card. Although I set strict usage of 540M, game showed perfomance similar to integrated graphics usage (it was like with latest Call of Duty game, where the same thing occured prior to some patch). On my desktop with lateset core-i5 with integrated graphics GC3 runs pretty well.