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Original poster
Apr 12, 2001
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Apple's line of newly updated 5K Retina 27-inch iMacs with Skylake will support up to 64GB of RAM, an upgrade from the previous-generation 27-inch Retina iMacs that would only support a maximum of 32GB of RAM. According to OWC, The current 27-inch Retina iMac includes four memory slots that support up to 16GB of memory per slot for a total of 64GB.

newimac64gbram.jpg
Image via OWC

Build-to-order options for the 27-inch Retina iMacs only allow it to be purchased from Apple with a maximum of 32GB RAM, but OWC will offer 16GB modules in 48GB and 64GB configurations for the new iMac. OWC plans to start selling its new 48 and 64GB kits tomorrow, and pricing is as follows:

- Single 16GB module - $329.99

- 32GB Kit using 16GB x 2 Modules - $599.00

- 48GB Kit with 16GB x 2 + 8GB x 2 - $729.00

- 64GB Kit with 16GB x 4 - $1195.00

The new 27-inch iMacs were announced this morning and are available from Apple retail stores and Apple's online store. Pricing for the machines starts at $1,799 for a 3.2GHz quad-core processor, 8GB RAM, 1TB hard drive, and an AMD Radeon R9 M380 graphics card.

Update: OWC has torn down the new 21.5-inch 4K Retina iMac and has learned that the memory is soldered in, which means it can't be upgraded. Customers purchasing a 21.5-inch Retina iMac should get the maximum amount of memory they can afford at the time of purchase as there will be no third-party upgrade options. The maximum amount of RAM for the 21.5-inch iMac models is 16GB.

Article Link: New 27-Inch iMac Supports Up to 64GB of RAM, OWC Offering Upgrade Kits
 

Xeyad

macrumors 6502
Nov 19, 2012
342
288
not buying until they bring Target Display Mode back. Love the 5K screen, but I want to see other things on it other than the computer inside it. The computer becomes obsolete, but an extra screen will stay useful for a very long time.
 

besler3035

macrumors 6502a
Oct 29, 2004
530
86
Grand Rapids, MI
So, probably a dumb question here. If I were to buy the baseline 8 GB or even the 16 GB model from Apple, would I be able to take advantage of the four slots for RAM if I bought any after-market? I know the 8 GB and 16 GB are just two slots.
 

uid15

Suspended
Mar 9, 2015
1,186
637
So, probably a dumb question here. If I were to buy the baseline 8 GB or even the 16 GB model from Apple, would I be able to take advantage of the four slots for RAM if I bought any after-market? I know the 8 GB and 16 GB are just two slots.

Well of course :)
 
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