Tonight, I purchased a brand new 15" rMBP. It's the 16gb, 1.7, 512 model. So far, I absolutely love it, but I'm having some problems with gaming under Boot Camp. I installed Windows and immediately went to the Nvidia site and downloaded the newest 650m drivers. I started up SimCity and the performance was terrible. On my 2011 iMac with 1GB graphics card, I can play at 2560x1440, lighting High, textures high, shadows medium, geometry high, animation detail high, AA off, and get a very consistent 30 fps. On my new rMBP, I only get 15-20 fps with everything in medium at 1900x1080. Obviously, that performance is nowhere near the iMac. I'm not expecting the MBP to be a amazing gaming machine, but it seems weird that a three-year-old iMac with a 1GB graphics card can blow away a brand new computer by that wide a margin. My questions are, shouldn't it be running better? Is there something wrong with my graphics card? Did installing the newest firmware screw something up? I'd appreciate any insight!