Apparently you can look at the iMac i7 on Haswell base as RAM bitch at full extension of the memory. Should run 32GB, with memory from Corsair and Kingston this involved problems with the stability. The sold here Samsung RAM is compared to Kingston and Corsair a piece of expensive, but came after a full working day to date not a single problem to solve (as opposed to the normal working day, I have always done my best to fill it well and deal with) , From my side complete satisfaction, even with the shipping time, which was once again on a working day, top!