Name: 64.0GB (4x 16GB) PC3-12800 DDR3 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit
SKU: OWC1600DDR3S64S
Price: 499.99 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

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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:

Verified Buyer

Reviewer: Regulator1A Location: Moses Lake, WA Age: 35-44 Experience Level: Gamer Owned Product: less than a month

Rating: 5/5 This product is high quality and was exactly what I needed. July 30, 2018 The 32GB Memory upgrade kit worked out vary well. This product is high quality and was exactly what I needed. No defects and fully functional.

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: twentymiles Location: belvidere,il. Age: Over 65 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 works great July 17, 2018 best thing to add to speed up your computer. tutorial to install was perfect as always.

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: SmartPenwin Location: Mexico

Rating: 5/5 Great upgrade for an aging iMac July 16, 2018 Bought the upgrade as from time to time large excel sheets did hurt my 2012 iMac performance. This still a very good computer, and even when not retina I love the display. So I reviewed that memory was reason behind slowdowns. $150 was a very good deal even paying the local tax and import (I'm in Mexico) so went for it and have to tell I am very happy with the difference. iMac is snappy again even when 2 or 3 large excel sheets (over 32k rows) Great product at very good price point.

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: mvpereira Location: Rio de Janeiro, BRAZIL Age: 35-44 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Just what I needed July 12, 2018 The kit is specifically developed for the Mac I have. Just look for your model and get the improvement in performance you need.

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: AceChippe Location: Hickory, NC Age: 25-34 Experience Level: Hobbiest Owned Product: less than a month

Rating: 5/5 Upgrade galore July 10, 2018 Upgraded to OWC RAM based on reviews, price, and rebate. Along with new SSD, my laptop feels brand new.

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: Trish Location: Cleveland, Ohio Age: 55-65 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 Great Service July 7, 2018 I ordered memory for my MacBook Pro on Monday and received it on Thursday. With the help of the videos on the OWC site I was able to install the memory in under 10 minutes and I am now enjoying a Mac that is running much faster!

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: Jaybird Location: Vallejo, CA Age: 55-65 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Unbelievably Easy!! July 5, 2018 This had to have been the easiest upgrade!! The install video was perfect. I was up and running in minutes. Thanks!!

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: SRASLAN

Rating: 5/5 Works Well July 1, 2018 As Expected the extra memory gave me the boost I needed

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: Adobes Location: Prescott, AZ Age: Over 65 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 More Ram For Older iMac June 24, 2018 When I upgraded to High Sierra I needed more Ram in my wife's 2011 iMac. I ordered on line and received the memory in qick time. I looked at the videos on utube and installation only took a few moments. The computer fired right up and recognized the new ram. Great job and far cheaper that a new computer. We are good until the next upgrade by Apple.

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: supercake Location: Vancouver BC Age: 18-24 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 I hate myself for not buying this sooner!! June 18, 2018 My Macbook Pro Mid 2012 is SO much more responsive since I installed this 2 x 4gb RAM kit. I can't believe I sat looking at that dumb spinning beachball icon for SO long.... it's been 5 years... ew... BEST NEWS: I haven't seen it since installing the new RAM :)

OWC - thank you for a well packaged item, quick delivery time and an extremely competitively priced product that works GREAT.

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: Roman Location: Scottsdale, AZ Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months

Rating: 5/5 Easy to Install and Works Great! June 18, 2018 This was really easy to install — so easy, in fact, that I didn't even use the directions.

The upgrade gave my poor old little Mac Mini a significant performance boost for very little cost. (I went from 4GB to 16GB.)

There were no issues with the product whatsoever, and worked out of the package.

I would recommend this product to anyone in a similar situation as me, where you are suffering performance issues, but don't really want to buy a new system.

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: photo Location: Kansas City Age: Over 65 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 Memory Upgrade Kit June 11, 2018 Unbelievable how much better the I Mac runs Lightroom. Easy to install. This saved me from purchasing a new I Mac. I couldn't be happier.

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: WesternAnalog Location: Ohio Age: 18-24 Experience Level: Noob Owned Product: less than a month

Rating: 5/5 Works great June 8, 2018 Swapping out RAM is probably the easiest internal change you can do and there’s not much you can screw up. The product is working without issue.

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: Dragon Location: Hartford, CT Age: 55-65 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Perfect Solution for my iMac! June 4, 2018 This site came highly recommended and I can see why. The RAM chips were the perfect solution and were a no brainer to install. Other providers seemed to have issues.

The communication here was excellent, the shipment arrived sooner than expected and the follow up was on point.

I will not hesitate to purchase from OWC in the future!

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: Darnstrat Location: Terre Haute, IN Experience Level: Power User Owned Product: 1-3 months

Rating: 5/5 Terrific! May 29, 2018 Revitalized my MacBook Pro (2012) with this upgrade. Easy installation, fast shipping, great customer service.

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:

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 $499.99

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