1-800-275-4576
128GB OWC Memory Upgrade Kit
4 x 32GB PC21300 DDR4 2666MHz SO-DIMMs for 27-inch iMac with Retina 5K (2019 - 2020) and compatible PCs
Mfr P/N: 2666DR4S128S OWC SKU: OWC2666DR4S128S
$90.99 off - *NOW* Get Parallels Desktop Pro Edition - Windows/Multi OS Compatibility software for Mac - Only $29.00 with select OWC SSDs, HDDs, Memory, External Storage, and Optical Drives! (Limit 3 rebates, 1 rebate per qualifying item)
Must purchase with: Parallels Desktop Pro Edition for Mac - 1 Year License. SPECIAL PURCHASE
Memory Built by Mac People, for Mac People (and PC too), for Over 30 Years
- Memory is the most cost-effective DIY upgrade you can make to your Mac or PC.
- Unleash the true speed and performance of your system and applications.
- Experience increased efficiency and productivity. Open more apps and files, all at the same time.
- Warranty Safe Upgrade
- Free step-by-step installation videos
- Why do I need more Memory?
- 30 Day Money Back Guarantee
- OWC Memory Lifetime Limited Warranty including Advanced Replacement Program
Trade In Your Original Memory and SAVE!
Within 60 days from the purchase date of qualifying OWC memory, you can choose to trade in your old memory for a cash rebate! Learn More »
Overview
OWC Memory. Built for Macs + PCs.
Experience your computer's true performance potential.
Improve System Speed
OWC Memory is the most cost effective and simple DIY upgrade you can install to unleash your Mac or PC's full potential, and speed up overall responsiveness.
More Apps. More Files
Become a multi-tasking maven when you upgrade your Mac or PC with OWC Memory. Open more apps. Open larger files. Plus, work with multiple files all at the same time.
Save $$ vs Factory
Save BIG vs factory memory options. Plus, select among options not offered by the factory. OWC makes it easy to find the perfect upgrade to fit your needs.
Lab Tested Compatibility
We test every OWC memory module at our in-house lab so you can upgrade with the confidence that your memory is built-to-last.
Lifetime Warranty
We built your OWC Memory upgrade to meet or exceed the toughest industry specs to provide years of worry-free service.
Step-by-Step Videos
Our detailed install videos guide your upgrade from start to finish. We provide all the steps to make your OWC Memory upgrade DIY easy.
Experience the OWC Difference
Rely on the trusted name for memory upgrades, drives and accessories for over 30 years. Your OWC Memory upgrade was built by Mac and PC people, for Mac and PC people. Our expert support team is always a call or click away. You can talk to an actual human who will kindly provide advice and guidance for any questions you may have.
Being helpful and treating others the way you would want to be treated is not just a novel idea. It’s how we do business. It's how we’re built. It's what we’ve been doing since 1988.
Includes
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- (4) 32GB PC21300 2666MHz DDR4 SO-DIMM memory modules
- OWC Memory Lifetime Limited Warranty including Advanced Replacement Program
Specs
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Data Rate
- 2666MT/s
I/O Clock Speed
- 1333MHz
Registration
- Non-registered
Error Correction
- Non-ECC
Cycle Time
- 0.75 ns
Form Factor
- SO-DIMM
Type of Memory
- DDR4
PC Speed
- 21300
Timing
- CAS = 18.0
- Full Parameters: 18-18-18-14
Bandwidth
- 21.3GB/s
JEDEC
- Fully compliant with JEDEC specifications
Total Capacity
- 128GB
Pin Count
- 260-pin
Printed Circuit Board Type
- Low noise 8-layer PCB
RoHS Compliant
- Yes
Ambient Temperature
- Operating: 32°F to 185°F (0°C to 85°C)
Compatibility & Installation Videos
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PC Compatible
Videos
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Customer Reviews
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My 2019 27" iMac was running extremely slow, especially after upgrading to macOS Sequoia. While upgrading the memory helped, the computer is still slow opening some apps. I have read other reviews that suggest that the 1TB Fusion Drive may be part of the problem, and that installing an external Thunderbolt SSD boot drive may help; however, I'm not sure if I want to spend more money on a 7-year old computer. I will evaluate over next few months.
I would recommend this product to a friend!
Verified Purchase.- Reviewer:Reviewer3195472596
Thank you for sharing your experience with your 2019 27" iMac! We're thrilled to hear that the memory upgrade made a positive impact. It’s awesome to see customers like you actively seeking ways to enhance their machines! We totally understand your hesitation about investing more in an older computer. If you decide to explore the Thunderbolt SSD boot drive option in the future, we’re here to help with any questions or guidance you might need. Your feedback is invaluable, and we appreciate you taking the time to share it with us! Please feel free to contact us if you have any further questions, comments, or concerns. https://eshop.macsales.com/Service/
Easy peasy! Great selection of products. Pricing is reasonable, although a bit cheaper if purchased on Amazon. Overall I appreciate the online purchase experience. It’s good to know where to turn to for Mac accessories.
I would recommend this product to a friend!
Verified Purchase.- Reviewer:NJ Theolog1
Wow, thank you so much for your fantastic review! We're thrilled to hear that you had such a great purchase experience with us and found our selection to be top-notch. It means a lot to us that you appreciate our online shopping process and consider us your go-to for Mac accessories. We strive to provide quality products and excellent service, and your feedback truly motivates us to keep going! Please feel free to contact us if you have any further questions, comments, or concerns. https://eshop.macsales.com/Service/
It all went well! It got here on time
I would recommend this product to a friend!
Verified Purchase.- Reviewer:tkhalloran
Thank you so much for your wonderful review! We’re thrilled to hear that your order arrived on time and that you had a great experience with our sale. Your satisfaction means the world to us, and we appreciate your support! Please feel free to contact us if you have any further questions, comments, or concerns. https://eshop.macsales.com/Service/
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