|Item Height||5 inches|
|Item Width||0.44 inches|
|Computer Memory Type||DDR3 SDRAM|
|Memory Clock Speed||1866 MHz|
|Are Batteries Included||No|
|Item model number||CT4G3S186DJM|
|Product Dimensions||17.78 x 1.12 x 12.7 cm; 30 Grams|
Crucial CT4G3S186DJM Single DDR3-1866 (PC3-14900) 204-Pin SODIMM RAM, 4GB
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- Enter your model number to make sure this fits.
- Increases system performance.
- Compatible with Apple iMac (Retina 5K, 27 inch, Late 2015) iMac17.
- All memory stick modules extensively tested at the component and function level.
- Meets or exceeds, Apple's quality standards and requirements.
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CT4G3S186DJM is a single 4GB DDR3/DDR3L SODIMM module that operates at speeds up to 1866 MT/s and has a CL13 latency. It is dual voltage and can operate at 1.35V or 1.5V. It is Unbuffered and is non ECC. It conforms to the industry standard SODIMM layout of 204 pins. This particular upgrade may not be compatible for other models of computers. Please check for compatibility using the Crucial Memory Selector tool. Easy installation.
1x 4GB DDR3L 1866MT/s SODIMM Memory for Mac
Compatible with Mac systems
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, Crucial makes adding memory the easiest way to upgrade your Mac.
Reliability for Mac systems
When you use your Mac system, you expect intuitive, dependable performance. Expect the same out of your memory. Every Crucial module that leaves our doors has been extensively tested at the component level for voltage and temperature resistances, signal integrity, and software compatibility.
Speed for Mac systems
A memory upgrade is the fastest, easiest, and most affordable way to get more performance out of your Mac system. Upgrade your Mac with Crucial memory modules and maximize your creativity with top speed and high density DDR3 and DDR4 memory modules.
Support for Mac systems
Unsure how to install memory or have an important question about your Mac system? Let the Crucial experts help! They know Apple systems inside and out and enjoy providing helpful, friendly technical support. Whether it's phone support, videos, FAQ articles, or do-it-yourself install guides for more than 70 different Mac systems, Crucial has the resources you need to keep your system up to speed.
Micron quality – A higher level of reliability
As a brand of Micron, one of the largest memory manufacturers in the world, Crucial memory for Mac systems is backed by the same quality and innovation that has produced some of the world’s most advanced memory and storage technologies. With a product portfolio that includes upgrades for more than 100,000 systems, we’ve got one specifically designed for your Mac system.
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Most helpful customer reviews on Amazon.com
Reviewed in the United States on 24 October 2017
My iMac properly recognizes these chips, and the specs are exactly what you need. Some of the specs listed don't appear to match up (e.g. 1866 vs. 1867 MT/s) but I can confirm, both from experience and from chatting with Crucial support, that this kit is exactly what you need if you want to upgrade your Late 2015 iMac to either 16GB or 32GB of RAM.
When I bought this ram it was selling for $109 a kit, and it was too good a deal to pass up to get. a full 32 GB of ram.
The memory is extremely easy yo install on the iMac.
1. shut down the iMac from the apple menu.
2. disconnect all cables.
3. lay the iMac face down on a soft and stable surface such as a bed, or other such as a table with a towel over it.
4. Use a pointed object such as a pen, to gently , but firmly push the button located inside the power terminal to release the memory door.
5 Remove memory door and release the memory cartilage levers.
6. insert new modules making sure to line up the notch on the DIMM with the slot and press into place until it clicks.
7. lock the memory carriage back into place with the tabs, and replace ram door.
8. Reconnect iMac and power one. Don't be alarmed if the Mac takes a few seconds before the chime, as this is normal to test and calculate the new ram, the first time.
Reviewed in the United States on 6 January 2016