Ok so even though there is 1GB gRAM in the rMBP, the display resolution kind of just evens it out to a regular MBP's graphics capability (if you understand what I'm saying). I was planning on getting the rMBP (2.3Ghz, 16GB RAM) and playing the Sims 3 on it using large houses. It does take up the C/GPU quite a bit, and was wondering if I would find lag at all. Thanks for any help that I can get! Edit: I'd also like to mention that I would like to have all the settings on high.