It would do all right - dependent on the clock speed, as that often has a big impact on games. And In general a quadcore is way more suitable for windows gaming, as windows do tend to eat some resources. Yes i5's are good for regular gaming on desktops, as they are quadcores. However on mobile, i5's for the most is dualcores with hyperthreading. In this case Apple has used ULV (ultra low voltage) cpu's, which honestly just don't do the trick in most game (imho) But IT IS game dependent - try Metro Last light and you will have an AWESOME experience, as it is GPU heavy, and the cpu load might max lie around 80%.. If i try GTA V, story mode is fine, but when i try multiplayer and I have to load high content and extremely many moving objects, it will stay at 99-100% constantly - and even with a gtx 970 I experienced microstuttering, which was unplayable. Honestly - Had I known that, would I not have spent 1000+$ on my setup.