Apple iMac 27 inch 2012 review: Core i7, GTX 680MX and Fusion Drive
 

This version of the 27-inch iMac is a very fast system, and it still of course has the outstanding 27-inch 2560x1440 display. We loved how the Fusion Drive works in MacOS X. It strikes the perfect balance between having a fast SSD and lots of storage, and it automatically prioritizes which applications and data are stored where.

http://uk.hardware.info/reviews/4026...d-fusion-drive