Late 2015 27 iMac 5k RAM spec

I am planning to get a new iMac 5k 27" with 4GHz. I'd like to know the RAM specs and any recommended third party RAM that I could use with the system.

Most RAMs available online mention a freq of 1866 Mhz but Apple's spec seems to be 1867, i.e. off by 1. Would that matter?

Also, what are the other things I need to look at before getting a third party RAM for the new iMac.

iMac with Retina 5K display, OS X El Capitan (10.11)

Posted on Oct 13, 2015 12:30 PM

108 replies

MM262

Level 1

9 points

May 26, 2017 3:00 PM in response to pinkxter

It shouldn't be underclocking your system by any means. Idk anymore with Apple this is just dissapointing

Csound1

Level 9

60,063 points

May 26, 2017 3:18 PM in response to MM262

What is the current clock speed?

MM262

Level 1

9 points

May 31, 2017 1:27 PM in response to MyronK

Yes and I've heard good things about crucial as well, the thing is I actually tried those sticks that you have as well except just an 8 GB and the problem wasn't so much

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Late 2015 27 iMac 5k RAM spec