So, if you believe what you read on many of these threads on Macrumors and review sites, you can run Diablo 3 at insane resolutions on the new MBP with Retina display. My findings are quite the opposite, but I suppose it depends on how you define "smooth." My preference is for games to run at 60fps. With Diablo 3, that's pretty much impossible at any normal resolution. For reference, it's the base model MBP with Retina display: 2.3Ghz i7 8GB RAM 256GB SSD First, I always turn v-sync on. This is perhaps a personal preference, but with v-sync off the screen tearing is quite distracting. V-sync set to off will increase the maximum frame-rate the game can achieve (in this case - anything over 60fps), but does not increase the minimum frame-rate. All settings are set to highest except shadows, which are set to "Low," and anti-aliasing which is set to OFF. The resolution is 2048x1280. Frame-rate? 30fps, and not even 30fps solid. For example, with a lot of spells flying through the air in Act II Nightmare, I was able to get the frame-rate to drop into the teens. You don't even have to be doing all that much to get the frame-rate to nosedive, either. On one of the quests in Act II, you go to see the emperor child, and then have to escape to the sewers. Just before the sewers, there are a few pots/benches/carriages that line the outside pathways, and destroying those causes a complete frame-rate dip. All is not lost, though. For most of the time the game runs at a solid clip. 30fps is mostly attainable in most normal resolutions (1680x1050 and 2048x1280). 2880x1800 is not playable (to me) at any setting, since the framerate is in the teens with vsync on or off, and dips ever lower with action going on. Anyway, this game does not run at 60fps under most circumstances (the ugly 1440x900 with shadows off is one case where it does hit 60). I personally find the jump between 20fps and 60-90fps quite jarring, so I'd rather have it "locked" to 30fps with occasional drops below that by setting vysnc to on. As for me, I'm definitely disappointed in how Diablo 3 runs. Coming from my 2009 i7 iMac, I was hoping to improve somehow on that with this new laptop. My 2009 iMac runs Diablo 3 at a reasonably solid 30fps (with again, some occasional drops to the 20s) at 1920x1080 resolution, shadows off. So there you go. I was truly hoping for 1680x1050 at a solid 60fps with most settings enabled, but that's simply not possible on this laptop. Maybe next year! If you have any questions, feel free to ask.