Recently, I installed Windows 8.1 via bootcamp on my 21.5 inch Late 2013/2014 iMac (2.9-3.6Ghz quad core i5, Nvidia GeForce GT 750m w/ 1,GB GDDR5 VRAM) and even when playing games such as Far Cry and Battlefield on high at 1080p the fans don't get any more audible than normal and the back of my iMac gets just slightly warm with some warm air coming out the back. I am reality impressed with the cooling of the iMacs, do you all feel the same? Do to ever hear your iMac when playing games?