2.3G 8GB 256 default version RMBP, lg screen and have image retention problem, but it fades in a few mins though. I don`t bother to exchange my unit due to the distance i need to travel. but now i have a new overheating problem, today, i tried wow 64 bit client at lowest setting but 2880 screen resolution. The temp went to 99 and then over 100, system fans spin at 6k rpm and i have a usb MINI fan on the side to blow the hot air away as well. i could cook eggs on it for my breakfast. I did a cpu stress testing and it looks like i have similar problem with this thread --RETINA OVERHEAING http://forums.macrumors.com/showthread.php?t=1432679 if anyone here use the rmbp to play starcraft2 or wow64bit or 32bit at reasonable setting, please post your temp while playing games or rending videos.