I've been using a MacBook since 2009, and now that I'm out of college I want a desktop. I am looking at the refurbished 2012 21.5" iMacs. Love how it only has a single cable and has a small foot print yet a beautiful display and nice sounding integrated speakers. The most demanding application would be League of Legends, which I play via Windows because the Mac Client is terrible. I would like to know if the 2012 iMac can play League at native 1080p at 60 fps. I'm fine with low quality. If so, do you have the 640M or the 650M?