I was wondering if I were to buy some more RAM for the new iMac. Would it be compatible if I were to buy some more RAM for my Late 2011 MBP 17'', then later move it over to the new iMac when I get it?
What would work great on both the iMac and the 2011 MBP would be the Corsair Vengeance 16GB kit.
[url=http://ecx.images-amazon.com/images/I/51a1EdgvJcL.jpg]Image[/URL]
If you decide to put it in the iMac, you can use it together with two existing modules without any problems.
I'm not sure if that's completely accurate (mixing this kit with the original RAM). I believe I saw another response in a different thread that indicated that this kit has a lower CAS Latency (CL) than the stock RAM and when mixing the two it would bump the memory bus down to a lower speed.