Name: 64.0GB (4x 16GB) PC3-12800 DDR3 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit
SKU: OWC1600DDR3S64S
Price: 549.99 USD
Availability: InStock
Rating: 4.94 (332 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 / 5 320 out of 332 (96%) reviewers would recommend this product

1 2 3 4 5 6 7

Verified Buyer

Reviewer: kdthomp Location: Aurora, CO Age: Over 65 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 Order was received quickly April 29, 2018 I am very happy with this memory purchase. This isn't the first time I've ordered and definitely won't be the last!

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: al2eren Location: Innsbruck,Austria Age: 25-34 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 This product has great features April 19, 2018 This review is from 8.0GB PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 SO-DIMM Memory Module. Customer Videos:

Verified Buyer

Reviewer: RickatUT Location: Austin, TX Age: Over 65 Experience Level: Power User Owned Product: less than a month

Rating: 5/5 it's great April 17, 2018 2 grad students, each with an older 13" MacBook Pro (model 9,2) that came with 4GB RAM installed. Bought 2 sets of 8GB for them. They easily installed it, and they're both happier. Not as happy as if they'd been bought new laptops, but happy with the increase in speed. If they're good, I may get them each a hybrid disk drive, and that'll make those old laptops feel a lot 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: timmyabell Location: Asheville, NC Age: 55-65 Experience Level: Power User Owned Product: 1-3 months

Rating: 5/5 Fabulous! April 9, 2018 I am so glad I decided to upgrade my 2012 Macbook Pro from 8GB to the OWC 16 GB. It immediately gave my computer a boost, with breathing room for RAM memory. I have an app which shows me how much RAM is being used and it was topping out with the 8Gig and now with the 16 gig it is regularly showing over 50%, which means I did the right thing. This is a great company - I've also upgraded to the 1TB SSD, both the new hard drive and memory were easy to install myself with the tools which came with the 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: Jazzz Location: Montreal Canada Age: 55-65 Experience Level: Power User Owned Product: over 6 months

Rating: 5/5 Works like a charm as all OWC products April 3, 2018 Works like a charm as all OWC products

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: TioMacMini Location: Brooklyn, NY Age: 35-44 Experience Level: Hobbiest Owned Product: over 6 months

Rating: 5/5 Resurrection March 21, 2018 So easy to install. and they brought my mac mini back to life. Everyone should get these without hesitation!!

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: Gigem72 Location: Eureka Springs, AR Age: Over 65 Experience Level: Home User Owned Product: less than a month

Rating: 5/5 Memory March 18, 2018 The memory came properly packaged and was easy to install following the video. This was a great experience and although it was first with MacSales it will not be my last!

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: porchcrack Location: Burlington, VT Age: 45-54 Experience Level: Noob Owned Product: less than a month

Rating: 5/5 Great product and easy to install March 16, 2018 I was a little nervous about opening my Macbook to install the memory, but with the very concise videos OWC provides, it was super easy! The upgrades I made are really noticeable in speed and stability as well.

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: Quadrivium Location: Provo Age: 45-54 Experience Level: IT Professional Owned Product: over 6 months

Rating: 5/5 iMac is now Packed! March 12, 2018 Got my Ram, running several VMs all at once, I no longer get spinnning beachball alot when running my Windows VM! I know, but I really have to run it sometimes....

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: 12AX7 Location: Bakersfield, CA Age: 55-65 Experience Level: IT Professional Owned Product: over 6 months

Rating: 5/5 Good deal and works perfectly March 8, 2018 The order arrived more quickly than expected, positive #1. Took all of about 15 minutes to remove the existing RAM from my iMac and install the new modules from OWC, positive #2.

On startup, machine ran short test (maybe 15 seconds longer than normal boot), recognized the increase in RAM and started up with no problems. Checked system information, had 32GB of correct RAM listed for memory. Positive #3.

iMac felt quicker, noticeable but not huge difference as it had 16GB before, but multitasking and program startup both benefitted from the addition. I was able to re-use the prior installed RAM to upgrade an older Mac mini, so this was a win-win all around.

Thanks, OWC!

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: hhump Location: NC Age: 45-54 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Fantastic! Money well spent. March 7, 2018 The RAM was easily installed. There was an immediate improvement in my 2012ish MBP’s performance. It felt like I had a new machine. The performance improvement seen after the RAM update removed any doubt about my continuing my upgrade with the purchase of an SSD drive.

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: vdubeau Location: Corpus Christi, TX Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months

Rating: 5/5 Great Product March 7, 2018 I've never been disappointed with products from MacSales and this no exception.

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: Hardworker Location: FL

Rating: 5/5 Very satisfied February 19, 2018 I went to your page and the orientation was accurate and useful. I bought 32GB for my iMac late 2013 and the product arrived in the estimated time. I installed it myself and now I'm very satisfied with the results. Thank you.

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: Kevin1992 Location: Dallas, TX Age: 25-34 Experience Level: Noob Owned Product: 1-3 months

Rating: 5/5 Great and easy install February 13, 2018 The product shipped same day as it was placed and got to my business in no time. The installation videos on OWC were super easy to follow. The product has been in my computer for 2-3 weeks now and made it exceptionally faster.

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: snickerdoodle

Rating: 5/5 This product really works! February 13, 2018 I totally recommend this site for people who are having troubles with their MacBooks! With the exception of one guy here who led me back to the initial problem, the next rep helped to alleviate the problem and get rid of it FOR GOOD! Thanks guys!

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: simonB Location: Ottawa, Canada Age: 45-54 Experience Level: Hobbiest Owned Product: less than a month

Rating: 5/5 quick & easy installed February 10, 2018 great price, easy DIY instruction from the site.

recommend it!!!!!!

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: MAXisWELL Location: Roseville, CA Age: 35-44 Experience Level: Home User Owned Product: over 6 months

Rating: 5/5 Works Great February 8, 2018 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: cruzned Location: Va. Bch.. VA Age: Over 65 Experience Level: Power User Owned Product: over 6 months

Rating: 5/5 Totally stoked with your service January 30, 2018 I recently purchased a memory upgrade for my iMac after being told by Apple that I could not do this myself and that they would need to keep my computer and do the installation. Not true! It actually took about five minutes to remove the plug, open the little door by that, insert the chips, plug it all back in and reboot. Now I have tons of memory!

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: 1as3 Owned Product: less than a month

Rating: 5/5 Makes my Mac scream! January 28, 2018 Works great in my Late 2013 21.5" iMac

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 Top 100 Contributor

Reviewer: MacJustMac Experience Level: IT Professional

Rating: 5/5 Excellent upgrade to keep an older MacBook Pro alive! January 26, 2018 Trying to keep my nephew's mid-2012 non-retina 13" MBP relevant for the remainder of his college years. Started with this component (SSD and Battery also part of the upgrade - separately reviewed). His MBP came with 2x2GB of RAM. Hardly sufficient for running Sierra plus other apps like MATLAB and old versions of Microsoft Office. This upgrade doubles the 8GB limit that Apple originally imposes on this model, so it's a huge win for the money. I've applied these "RAM Doublers" in other compatible models and they work as advertised. My nephew performed the upgrade himself under my remote guidance over FaceTime.

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 Top 250 Contributor

Reviewer: Norvgen Location: Sun City West, AZ Age: Over 65 Experience Level: Home User Owned Product: 1-3 months

Rating: 5/5 Speed January 24, 2018 Good speed increase. System recognizes the new ram right away.

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: Jjtrue

Rating: 5/5 Perfect January 18, 2018 Everything went together perfectly and my MacBook pro mid 2012 is very fast.

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: heyzarling

Rating: 5/5 worked well, nice speed increase January 15, 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: CaptainAmerica Location: Schofield, WI Age: 35-44 Experience Level: Power User Owned Product: 1-3 months

Rating: 5/5 INSANE performance upgrades January 4, 2018 I swapped out the dual 2 GB sticks in my Mid-2012 MacBook Pro for these two 8 GB sticks. Wow. Instant and consistent performance improvements. Apps and programs open and load quickly each time. No beach ball or bouncing icon at the bottom of the tray. Operations load quickly and nothing lags anymore. Apple rates the MacBook at handling dual 4 GB sticks, but as others have stated, they handle the 8s no problem. It’s like a whole different computer. Well worth the money.

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: MacForever Location: Illinois Age: 45-54 Experience Level: IT Professional Owned Product: less than a month

Rating: 5/5 Great upgrade January 2, 2018 Super easy performance upgrade. The OWC videos make it a snap to do. I combined this with an SSD updated to and my MacBook Pro is like new again. Very inexpensive and easy upgrade. Highly recommend to others.

This review is from 8.0GB (2x 4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

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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 (332)

only $549.99

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