I'de like to gather and discuss informations and opinions on aftermarket RAM keeping in mind iMac refreshes are around the corner. I did some research in guides and forums. Here are my thoughts. I do know that some of them are contradictory or probably even plain wrong. So PLEASE feel free to add and correct. -Samsung, Hynix and Kingston manufactor high Quality memory -Apple uses memory produced by those three manufactors. You never know what you are going to get when you order your iMac -If you want to add Memory to your current gen iMac you have to get DDR3 So-Dimms with 204pins unbuffered 1333Mhz (PC3-10600) -Those specification are not going to change with the next generation of iMacs (?) -Some recommend to always get Samsung RAM especially if you want to upgrade to 16 Gb to minimize chance of failure -Others say either one of the three main manufactures is fine -Others say you just have to make sure to have all your modules produced by the same manufacture (which means checking the installed modules before adding new ones) -Others say the manufacturer doesn't really matter. You just have to make sure the specifications are correct. -And of course there are individual experiences and huge differences in prices to consider. Those points are just meant to start us off. Lets add and discuss!