Name: 64.0GB (4x 16GB) PC3-12800 DDR3 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit
SKU: OWC1600DDR3S64S
Price: 374.88 USD
Availability: InStock
Rating: 4.94 (345 reviews)

64.0GB OWC Memory Upgrade Kit

4 x 16GB 1600MHz DDR3 SO-DIMM PC3-12800

OWC Memory Lifetime Limited Warranty including the OWC Lifetime Advanced Replacement Program | 30 Day Money Back Guarantee

Product Specs:

Technology: DDR3 SO-DIMM
Density: 4 x 16GB (16384MB)
RoHS: Yes
Pin Count: 204-pin
Op. Temp.: 0C to +85C
Data Rate: DDR3-1600
Speed: PC3-12800
CL: 11
Cycle Time: 1.875ns
Voltage: 1.35V
ECC: Non ECC
Module Ranks: Dual Rank
Register: Non Parity
Low Noise 8-Layer PCB
Meets and/or Exceeds Apple/Intel Specifications
Fully Compliant with JEDEC specifications
RoHS Certified
Free Installation Videos & Manuals
Warranty Safe Upgrade.
OWC Memory Lifetime Limited Warranty including the OWC Lifetime Advanced Replacement Program
Why do I need more RAM?

Save money by trading in your original chips! View available memory rebates.

From the purchase date of qualifying memory from OWC, you have 60 days to trade-in your old memory for a cash rebate!
Just fill out OWC's online rebate form or contact OWC Customer Service after you receive and install your new memory.

- Please allow up to 14 Days from the time we receive your memory for testing and rebate processing.
- The OWC Rebate is for up to the same number of memory modules purchased and must be in working order.

This OWC Memory is compatible with... Learn how to find your Mac's model ID or PC specs

iMac w/Retina 5K display
(27-inch Late 2015)

(October 2015)

Model ID:iMac17,1

3.2GHz i5, 3.3GHz i5, 4.0GHz i7

Detailed specs

Install Videos

Customer Ratings

Write a Review 4.9 / 5 332 out of 345 (96%) reviewers would recommend this product

1 2 3 4 5 6 7

Verified Buyer

Reviewer: macboy75 Location: Jersey Age: 18-24 Experience Level: Noob Owned Product: 1-3 months

Rating: 5/5 THIS WAS AMAZINGGGGGGGG January 14, 2019 Yo so many processing gainz i loved this product and it was the best purchase i made for my MacBook Pro. I HEAVILY RECOMMEND!!!!

THANK YOU OWC

The videos were extremely helpful and super easy to follow along with.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: landofbugs Location: New Haven, CT Age: 18-24 Experience Level: Power User Owned Product: 1-3 months

Rating: 5/5 Saved my 2012 Mac! December 19, 2018 A few weeks ago, my mid-2012 MacBook Pro suddenly shut down and started to beep out the code for a RAM error. Trying to turn it back on never lasted more than a few minutes before it shut down again, and none of the solutions suggested online related to reseating the RAM sticks worked.

This product did the trick! After a 5-minute install, my Mac was back to great working order.

A tip for anyone in a similar situation: A MacBook Pro can run fine on one stick of RAM. Try using each stick individually to see if one still works, and that will help you keep working while you wait for the replacement RAM to arrive.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: Bob11 Location: New Mexico Age: 55-65 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 The memory works fine. November 20, 2018 Bought these for a Mid-2012 MBP to help speed things up a bit. As the day goes on it seems to help. It takes just as long to load things the first time as it did before, but that's macOS's fault. The memory is doing it's job.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: rfmilhous Location: Raleigh, NC Age: Over 65 Experience Level: Home User Owned Product: 3-4 months

Rating: 5/5 Added memory when changing hard drive November 19, 2018 When I switched to a solid state drive, I decided to double my memory while my MacBook was opened up. Easy installation and as usual OWC had easy to follow videos. The hardest part of the project was removing those tiny screws from tha back of the MacBook! I can’t really say if the increase in memory speeded things up since I switched to a solid state drive at the same time, but generally more memory is a good thing and the laptop is really flying now!

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: ZumbaGulu Age: 55-65

Rating: 5/5 Never crossed my mind November 11, 2018 It never crossed my mind that I could have 16GB of ram in my MacBook pro 9,2 until I saw it on the OWC site which i trust. I bought the 2x8GB Ram to replace my 2x4GB. Receive the package in good condition and installation was a breeze after watching the installation video.

This upgrade breathed a new life in the MacBook. It is definitely a more than welcomed upgrade.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: evans Location: Canberra, Australia Age: Over 65 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Excellent product November 11, 2018 The memory arrived in good condition and on time. it was easy to install and has markedly improved the performance of my iMac.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: Douggie Location: Australia Age: Over 65 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 Easy to fit, works exactly as expected. November 5, 2018 The 16 GB memory was sent from OWC promptly but delivery within Australia was slow (expected). When it arrived, there was less than ten minutes from shutting down to restarting. As promised, my MacBook Pro recognised the full RAM and where the amount of RAM is paramount, my computer has sped up. Six years old and it has a new lease of life. The RAM is now just quietly doing its job!

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: Grandy Location: Farragut TN Age: Over 65 Experience Level: Power User Owned Product: over 6 months

Rating: 5/5 Fits perfectly - Improves Instantly October 31, 2018 OWC’s memory for my old MacBook Pro laptop had enabled me to avoid trading it in on a faster model. The memory loaded up instantly and functions perfectly right out of the box. OWS’s great “how to” videos made it a snap and I am now one happy Mac user because I can keep my current machine going a few years longer.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: HSTBOY Age: Over 65 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 So easy! October 30, 2018 I had visions of a real effort required to upgrade my MAC till I looked on the web site and saw that there was a simple pop out door. The package was delivered quickly and the change is immediate. The old girl was getting pretty slow and now it is like a new machine for a fraction of the cost. I'm not sure how long the processor will be able to take SW updates, but till then, it's all good.

I would recommend this item to a friend! This review is from 32.0GB (4x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 SO-DIMM Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: DerSchweisserBildhauer

Rating: 5/5 Satisfies that need for speed October 26, 2018 Lightning fast performance now on this 2012 MacBook Pro-! Maxing out the RAM to 16 gb, along with an SSD makes it perform better than ever imagined; running design, CAD and then CAM programs with Parallels, still no lag whatsoever. OWC's service is prompt and (again) delivered ahead of time. (A nice unexpected bonus included in the package to commemorate the 30th Anniversary of OWC was a mini screwdriver pen and a gift card voucher for an online winery- very cool!)

I would recommend this item to a friend! This review is from 8.0GB PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 SO-DIMM Memory Module. Customer Videos:

Verified Buyer

Reviewer: TXiMacUser Location: Dallas, TX

Rating: 5/5 Excellent Memory October 21, 2018 Our iMac computer was slowing down at times due to an increased number of applications running on the background. This memory was so easy to install and it solved all the problems. No more slow downs.

This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer Top 250 Contributor

Reviewer: c3nme Location: Omaha, NE Age: 45-54 Experience Level: IT Professional Owned Product: less than a month

Rating: 5/5 Fast wake from sleep and take your computer back from Facebook October 15, 2018 Facebook is a bad product for a lot of reasons. In this case, because of how much of the computer's resources it uses to display a web page. It is often driving the browser up past 3GB. On a machine with only 8GB of RAM, that makes the performance reduce in other areas. I was going to upgrade to 16GB, but opted for 32GB for my spouse's computer and was told that it made a big difference. An easy way to combat the resource hogging Facebook.

I would recommend this item to a friend! This review is from 32.0GB (4x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 SO-DIMM Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: Ruddy Location: Indonesia Age: 45-54 Experience Level: Home User

Rating: 5/5 Great product October 14, 2018 I would recommend this item to a friend! This review is from 8.0GB PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 SO-DIMM Memory Module. Customer Videos:

Verified Buyer

Reviewer: Sharper

Rating: 5/5 Dependable parts October 10, 2018 I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: greenchimera Location: OH Age: 35-44 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 Performance Improvement September 29, 2018 Notably improved the performance of my aging MacBook Pro. Wish I had purchased this sooner. Another positive experience with OWC!

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: Importdreamersllc Location: Biloxi Age: 25-34 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Greatest upgrade possible September 20, 2018 This upgrade has definitely brought my MacBook Pro back to life.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: Cryptobyte Location: New Hampshire Age: 25-34 Experience Level: IT Professional Owned Product: 1-3 months

Rating: 5/5 Excellent Memory September 18, 2018 Great, quality memory module.

I would recommend this item to a friend! This review is from 8.0GB PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 SO-DIMM Memory Module. Customer Videos:

Verified Buyer

Reviewer: Royal Age: Over 65 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 RAM is a Plus September 13, 2018 16mb of RAM is so much better than 4 or 8. The computer works better!

This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: ihadtochooseanickname Location: Toronto Age: Over 65 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 Just like all the other good reviews September 12, 2018 Can't really add anything from all the other good reviews. Came quick, dropped in easily, worked instantly. It's all good.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: Debkil Location: Georgia Age: 55-65 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 Great Product and Great Service! September 10, 2018 I bought 16GB upgrade memory for my mid 2012 13 inch MacBook Pro. My computer was extremely slow, and very frustrating to use. After the easy self-install, my computer works better than new! The ordering process was easy, the product came within days, and the installation videos on the website were great! After my installation, my computer was only recognizing 8GB of memory, but after a call to tech support, I was walked through the easy fix! I couldn't be happier!

This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: kingryt Location: Oregon Age: 35-44 Experience Level: IT Professional Owned Product: 1-3 months

Rating: 5/5 Worked September 4, 2018 Mac never advertised that these would work until long after the laptop came out and new operating system software came through. I appreciate that these were also pre-tested and confirmed to work on the same model of Mac. It wasn’t guess work buying and hoping it works.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: Len1947 Location: Mississippi Age: Over 65 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Easy Order, Easy Install August 22, 2018 This memory upgrade was easy to find and order. With the detailed instructions from OWC the install was equally easy. My Mac Book Pro runs better now than it did out of the box. Also upgraded to an SSD.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: diegot84 Age: 25-34 Experience Level: IT Professional Owned Product: 1-3 months

Rating: 5/5 Memory works perfectly August 13, 2018 I was able to pick and change the memory because of this excellent web page.

Thank you!

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: sycamore Location: huntsville,al Age: Over 65 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 8 GB. memory up July 30, 2018 .I had a easy time changing old ones with new ones..thank you for tutorial as well, sycamore Ps. Is this warrantied for the life of my computer ?? is it registered.?

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer

Reviewer: KariL Location: Orlando, FL

Rating: 5/5 Great experience! July 30, 2018 Item arrived exactly as described, fast shipping, easy packaging. Good value for the price compared to other vendors. Highly recommend.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

1 2 3 4 5 6 7

OWC Memory 64.0GB 4 x 16.0GB PC3-12800 DDR3 Kit Mfr P/N: 1600DDR3S64S OWC SKU: OWC1600DDR3S64S OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Same Day

Reviews (345)

Only ~~$439.96~~Matched Kit for $374.88

Add to Cart

Additional Capacities & Kits:

4GB
- Ships: Same Day
- Only $28.99
- $28.99
8GB (2x4GB)
- Ships: Same Day
- Only $57.98
- Cyber Saver $48.98
8GB
- Ships: Same Day
- Only $52.99
- $52.99
12GB (8GB+4GB)
- Ships: Same Day
- Only $81.98
- Matched Kit for $78.88
16GB (2x8GB)
- Ships: Same Day
- Only $105.98
- Cyber Saver $97.88
16GB
- Ships: Same Day
- Only $109.99
- OWC Price $109.99
32GB (4x8GB)
- Ships: Same Day
- Only $211.96
- Matched Kit for $194.88
32GB (2x16GB)
- Ships: Same Day
- Only $219.98
- Matched Kit for $198.99
48GB (2x16GB+2x8GB)
- Ships: Same Day
- Only $325.96
- Garage Sale Price $288.88
64GB (4x16GB)