Originally Posted by
Renshi
Native resolution of a 27" is 2560x1440. So if you get 30-40FPS in 1080p you'll get around 20FPS in 1440p.
Playing games like League of Legends, Eden Eternal, Beat Hazard and those little things at 1440p is no problem (Even Minecraft. YOU SEE PIXELZ!), but when you play things like Crysis, Duke Nukem Forever or any of the "new-gen" games, then you're gonna get a drop in FPS.
That's why I've considered buying a 21-24" monitor, so I could play games at its native resolution with full FPS. Anyway, working on a 27" is f*cking great!
Ninja-EDIT: Anyway, I remember they've released a new generation of iMac with an HD5770, so if you get the new iMac maybe there's no problem in native resolutions.