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Crucial - DDR3L - 8 GB: 2 x 4 GB - SO-DIMM 204-pin - unbuffered

Mfg # CT2K4G3S186DJM CDW # 3939484 | UNSPSC 32101602

Quick tech specs

  • 8 GB: 2 x 4 GB
  • 1866 MHz / PC3L-14900
  • 1.35 V
  • non-ECC
  • SO-DIMM 204-pin
  • CL13
  • unbuffered
  • for Apple iMac with Retina 5K display (Late 2015)
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Know your gear

Take the guesswork out of upgrading your Mac with Crucial memory for Mac systems. Since Apple computers often have very specific memory requirements, including particular component densities, speeds, and SPD programming specifications, it’s important to use memory that’s engineered for your Mac. With more than a decade of experience manufacturing and developing memory for all types of Apple computers, trust Crucial memory to optimize your Mac system’s performance.

This item was discontinued on April 23, 2021

Enhance your purchase

Crucial - DDR3L - 8 GB: 2 x 4 GB - SO-DIMM 204-pin - unbuffered is rated 4.83 out of 5 by 24.
Rated 5 out of 5 by from Good Value Additional memory for my new iMac 27 inch 5k late 2015 computer that ships with only 8 GB-most of which is taken up by El Capitan. Now, I can have a number of memory hungry apps open, and still get good performance.
Date published: 2016-04-02T00:00:00-04:00
Rated 5 out of 5 by from Working great in my 27" iMac with Retina 5K (Late 1015) Good price, works great, fast delivery (again).
Date published: 2016-01-13T00:00:00-05:00
Rated 5 out of 5 by from 32 Gig Ram in New iMac Made the new iMac very fast and lots of RAM to operate powerful and many apps at once. Very Good Price for that amount of RAM.
Date published: 2016-01-13T00:00:00-05:00
Rated 5 out of 5 by from Excellent memory, good service Memory is the biggest 'knob' to turn for your Mac or PC to operate more effectively. Mac users who are able should 'top up' memory. This enables running multiple programs and/or having multiple windows open without the processor slowing down. There isn't anything not to like ... significant benefit for minimal expense.
Date published: 2016-02-05T00:00:00-05:00
Rated 5 out of 5 by from I would buy this product again Product was easy to install. Works great.
Date published: 2016-01-14T00:00:00-05:00
Rated 5 out of 5 by from Easy Upgrade It was a good price, installed easily and as far as I can tell works fine.
Date published: 2016-02-04T00:00:00-05:00
Rated 5 out of 5 by from Great product Works for iMac retina late 2015 and I've had it for a month with no issues
Date published: 2016-02-11T00:00:00-05:00
Rated 5 out of 5 by from 3rd time a charm 3rd iMac in 10 years and upgraded memory from crucial in all 3 computers. Works as it should and trouble free install. Also upgraded my macbook with no hiccups.
Date published: 2016-01-15T00:00:00-05:00
Rated 5 out of 5 by from Works Great - Late 2015 27" iMac Retina 5k i7 4gHz Memory arrived before the new computer did. I popped it in before booting for the first time and it's been running flawlessly since.
Date published: 2016-01-13T00:00:00-05:00
Rated 5 out of 5 by from Easy to Order It was easy to order the correct RAM and install using YouTube.
Date published: 2016-02-04T00:00:00-05:00
Rated 5 out of 5 by from Very Fast Delivery Installation instructions were very easy to follow and I had no problems installing my new RAM . Very simple.
Date published: 2016-01-13T00:00:00-05:00
Rated 5 out of 5 by from It's a Crucial product: It does what it's supposed to do. Added 16GB of RAM to my iMac 27" 5K Skylake for a total of 32GB for a substantial savings vs. buying it from Apple.
Date published: 2016-02-04T00:00:00-05:00
Rated 5 out of 5 by from Great value The memory upgrade greatly sped up Photoshop. No more Beachball of Doom. Memory does not seem to hum, buzz, whine or ask for money. As stated in cons, no supplied colorful refrigerator magnet. Installation instructions on OWC site better than Apple's. Will be very happy until the market changes and the price drops precipitously. Will then sigh and get on with life.
Date published: 2016-01-13T00:00:00-05:00
Rated 5 out of 5 by from Best Option for late 2015 iMac 27 inch 5K! Can take 8GB stock RAM (4 GB x 2) and replace with 4 sticks of 8 GB each to achieve 32 GB total. Total cost around 25% of what Apple charges for custom build.
Date published: 2016-01-22T00:00:00-05:00
Rated 5 out of 5 by from Love My Memory! My experience has been phenomenal. I work with Photoshop and Lightroom. the fastest experience I have had using 32G of RAM
Date published: 2016-02-03T00:00:00-05:00
Rated 5 out of 5 by from Perfect Added to 27 inch iMac 5k and everything works perfect...upgraded to 32gb.
Date published: 2016-09-23T00:00:00-04:00
Rated 5 out of 5 by from iMac 17,1 install without a flaw Got my memory upto 24 GB. Everything runs smoothly.
Date published: 2016-03-25T00:00:00-04:00
Rated 5 out of 5 by from Good to Go! Installation was very easy. Just popped open the computer and popped in the RAM. There was a significant speed boost afterwards. No faults so far.
Date published: 2016-01-14T00:00:00-05:00
Rated 5 out of 5 by from Back-ordered by a month RAM seems to be working fine. Order was back-ordered by a month even though I received a confirmation.
Date published: 2016-03-01T00:00:00-05:00
Rated 5 out of 5 by from Best Value! Excellent performance and reliability, at a low price.
Date published: 2016-04-10T00:00:00-04:00
Rated 5 out of 5 by from Never a Let-Down Upgraded two iMacs and several PC's over the years and "Crucial" has always been my first choice of memory products. Reliable and dependable chips. Customer Service is on-point and "always there" when you need any assistance. Can't go wrong using Crucial.
Date published: 2016-02-12T00:00:00-05:00
Rated 5 out of 5 by from Review of the Memory I use it in my new iMac. The memory seems to be working fine. My only criticism is that I could not track the package online and it was at the very end of the promised date to be delivered. The product itself was easy to install, (Great video) for installation. Thanks for your work, and follow up.
Date published: 2016-01-24T00:00:00-05:00
Rated 5 out of 5 by from GOOD PRODUCT Ordered a new iMac from Apple and , having had good experience with Crucial, I ordered the Mac with only limited memory...at same time placed order with Crcial for memory upgrade....memory arrived and was here before Mac arrived....easy to install and works great....Mac flues.....very happy with the purchase.
Date published: 2016-09-24T00:00:00-04:00
Rated 5 out of 5 by from iMac Memory Upgrade No tools needed. Removed the expensive Apple 4gb and replaced it with 32gb of Crucial memory. Inexpensive and easy.
Date published: 2016-02-03T00:00:00-05:00

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