Currently Being ModeratedJan 3, 2013 7:11 AM (in response to tal1971)
See > http://support.apple.com/kb/HT3011 You can install up to 32 GB, and you can buy it in OWC to guarantee the compatibility with your Mac > http://eshop.macsales.com/shop/memory/iMac/2012_27/DDR3L
Currently Being ModeratedJan 3, 2013 7:17 AM (in response to mende1)
Thanks for the help.
So does a particular ram module need installed in a particular slot, for example to give me a dual channel function in the ram, or is this something that doesn't need to be done on the iMac?
Currently Being ModeratedJan 3, 2013 7:20 AM (in response to tal1971)
That memory includes Dual Channel, but your Mac has got that feature because Apple installs two memory sticks of the same type, capacity and speed on the Macs. You can install the memory on the slot you want
Currently Being ModeratedJan 19, 2013 4:04 PM (in response to tal1971)
I just bought 2012 iMac with 27" display. I bought the stock 8 gb RAM and simply used the left over RAM modules from my wife's 2011 13" macbook pro (upgraded from 8 gb to 16 gb) and put the 2 8GB ram chips in my imac for a total of 16 gb. The RAM chips are identical from macBook pro 13" to new iMac. Awesome..
Currently Being ModeratedJan 20, 2013 12:10 AM (in response to tal1971)
Just an update about installing ram in a particular slot:
From another forum:
From Crucial ram tech support:
Apple installs the two 4GB sticks in the slots the processor accesses first for RAM.
Crucial recommends removing the two 4GB sticks (Apple's ram) and replacing with their two 8GB sticks, then installing the original two 4GB sticks (Apple's ram) in the remaining two empty slots.
From Apple tech:
Apple also recommends remove their two 4GB sticks, replace with the two Crucial 8GB sticks, then install the Apple sticks in the remaining empties.