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$70.99 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: PPDPROSUB1Y-REB29

24.0GB OWC Memory Upgrade Kit

6 x 4.0GB PC10600 DDR3 ECC 1333MHz 240 Pin
OWC Memory Lifetime Limited Warranty including Advanced Replacement Program |
30 Day Money Back Guarantee
Matched pair, perfect for the Mac Pro 8-core Xeon systems!
Memory Image
Product Specs:
OWC Memory for Mac Pro 8-core Xeon fully meets Apple's specifications with special attention to proper thermal specifications.
Memory Trade in
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.
*About the Apple Specified Thermal Sensor:
Ensuring maximum performance, reliability, and operational feedback -this DDR3 ECC Modules for the Apple Mac Pro 'Nehalem' 4 Core/8-Core and 'Westmere' 6-Core/8-Core processor models feature utilization of Apple qualified components including the inclusion of the Apple qualified Thermal Sensor EEPROM.
Please Note:
Memory modules may differ in appearance from those pictured.
This OWC Memory is compatible with... Learn how to find your Mac's model ID or PC specs
Mac Pro
Mac Pro 12-Core (Mid 2012)
(June, 2012)
Model ID: MacPro5,1
2.4GHz, 2.66GHz, 3.06GHz
Detailed specs
Install Videos
Mac Pro
Mac Pro 12-Core (Mid 2010)
(July, 2010)
Model ID: MacPro5,1
2.66GHz, 2.93GHz
Detailed specs
Install Videos
Mac Pro
Mac Pro 8-Core (Mid 2010)
(July, 2010)
Model ID: MacPro5,1
2.4GHz
Detailed specs
Install Videos
Mac Pro
Mac Pro 8-Core (Early 2009)
(March, 2009)
Model ID: MacPro4,1
2.26GHz, 2.66GHz, 2.93GHz
Detailed specs
Install Videos
PC Desktop
PC Desktops
Compatible with Intel / AMD Process based PCs capable with the specifications listed above. Memory complies with JEDEC Specifications, document JESD79-3B.

Customer Ratings

Write a Review 5 / 5 5 out of 6 (83%) reviewers would recommend this product
1 2
Verified Buyer Top 250 Contributor
Reviewer: BDAq Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Works grand. March 15, 2020 No idea why it works so much better than the previous 32 GB, when it never got close to using the 32 GB, seems MacOS was using VM with the 32 GB when it didn't need to?

I would recommend this item to a friend! This review is from 64.0GB (8x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models. Customer Videos:

Verified Buyer Top 100 Contributor
Reviewer: LWB250 Location: Florida Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 The OWC Garage Sale ROCKS! September 29, 2018 Bought this RAM with a Mac Pro 4,1 that will eventually get a Westmere processor that will allow it to use faster RAM. While I was a little bummed that there wasn't an even number of sticks available, getting the two I did buy at such a great price made it an easy decision to buy.

I've used OWC RAM for years, as I know that it will ALWAYS work in my Macs. Sure, it can be more expensive than the junk that you find elsewhere, but knowing that it's guaranteed for life and that it's tested and guaranteed to work in my Macs makes it all worthwhile.

Thanks a bunch, OWC! I'll be watching for more of this in future Garage Sales!

I would recommend this item to a friend! This review is from (*) 4.0GB DDR3 ECC PC10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models. Customer Videos:

Verified Buyer
Reviewer: IBuyStuff Location: Central Iowa Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Perfect performance September 19, 2018 I plugged it in, and away we went! 32GB of nice, speedy RAM to make me forget about a new machine for another couple years...

I would recommend this item to a friend! This review is from 32.0GB (4x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models. Customer Videos:

Verified Buyer
Reviewer: Thijs Location: the Netherlands Age: 35-44 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Great July 18, 2018 Works very well. Upgraded from 16gb 1066mhz. My 2009 MacPro 4.1 to 5.1 6 core 3.46 ghz works super fast and stable. 3 Dimms is the fastest setup.

High Sierra 10.13.6 (17G65) Boot-ROM-version: MP51.0089.B00

I would recommend this item to a friend! This review is from 24.0GB (3x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models. Customer Videos:

Verified Buyer
Reviewer: 1element Location: Mamteca., Ca Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Added another 8GB to bring it up to 32GB March 27, 2018 Previously had 24GB of memory in my 2010 Mac Pro 6 core. This brought me up as I do a lot of Photoshop work with large files.

I would recommend this item to a friend! This review is from 8.0GB DDR3 ECC PC10600 1333MHz SDRAM ECC for Mac Pro & Xserve 'Nehalem' & 'Westmere' models. Customer Videos:

Verified Buyer
Reviewer: ADC12345 Location: DC Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Top Notch Ram November 16, 2017 This additional RAM breathed life into my older MAC Pro. Awesome!

I would recommend this item to a friend! This review is from 24.0GB (3x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models. Customer Videos:

Verified Buyer
Reviewer: Jetjock Location: Illinois Age: Over 65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Fast processing with lots of RAM March 16, 2017 I upgraded my 2009 Mac Pro to 32 Gb of RAM to handle large Photoshop file processing like panoramas. Installation was super easy and I've not a single memory hiccup since.

I would recommend this item to a friend! This review is from 8.0GB DDR3 ECC PC10600 1333MHz SDRAM ECC for Mac Pro & Xserve 'Nehalem' & 'Westmere' models. Customer Videos:

Verified Buyer
Reviewer: RichInDC Location: Washington, DC Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 perfect February 1, 2017 No hassles popping these in.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models. Customer Videos:

Verified Buyer Top 250 Contributor
Reviewer: Anonymous Location: Rochester New York Age: Over 65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 MacBook Pro memory at Max July 24, 2016 When I ordered my new MacBook Pro from Apple, I planned on immediately pulling the memory and putting in the maximum it would hold. This is the best cost-effective approach. I also pulled the 500 gig. HD and replaced it with a 1 TB making my MacBook Pro ready for editing high definition video. Very satisfied with the approach I took. You can learn how to do it I watching the videos on the OWC website.

This review is from 32.0GB (4x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer
Reviewer: Anonymous Location: quebec,qc Age: 35-44 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Way faster July 4, 2016 nice ram perfect

I would recommend this item to a friend! This review is from 32.0GB (4x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer
Reviewer: Anonymous Location: Serbia Age: 45-54 Experience Level: Power User Owned Product: less than a month
Rating: 4/5 Memory added April 1, 2016 Hi I want to share my impressions with you..

My Macpro 5.1 now updgraded with 24 GB OWC upgrade kit. Everything passing all tests smooth .Finnaly my loved Vienna Ensemble Pro and Protools can play a lot of Instruments and voices.

Thank you OWC. Next move will be your E2 PCIe SSD!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Paris, France
Rating: 5/5 Good priduct and exceptionnally good customer service March 30, 2016 My experience was buying this 24Gb RAM ugrade for my MP 5,1 6-core 3,33Ghz, which I had been looking forward for a long time (also highly upgraded the GPU last month). The product is as mentioned, was installed and works like a charm (although I believe I was already confortable with 12Gb of RAM, I noticed some RAM page outs lately using Photoshop CS 6 / Capture One / Firefox). Now what happened is that the package got stolen in my mailbox and that it was difficult for either service (OWC/Macsales and the French postal service) to assume responsability for this theft. Nevertheless, having proven my honesty in this situation, Macsales took it to them to send me another pack, at the one and only condition I accept DHL (and the customs fee, about 1/3 of the total price in the end, but still worth it). I must pay total respect to the quality of the customer service here which helped me from A to Z. Cheers ! And to those that order from EU for example, I strongly recommend using the trackable and person to person delivery exclusively. Too much theft in mailboxes in Paris these days !

I would recommend this item to a friend! This review is from 24.0GB (3x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer
Reviewer: Anonymous Location: Toronto Age: 25-34 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Mac got new life January 9, 2016 upgraded to 16gb extra ram for my macpro tower & it just got new life !! so much faster than before , render videos in less time & speeds up multi-program tasks for me

I would recommend this item to a friend! This review is from 16.0GB (4x 4GB) DDR3 ECC PC10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer
Reviewer: Anonymous Location: fdog Owned Product: 1-3 months
Rating: 4/5 A bit slower than I thought it would be November 12, 2015 But that could just be due to more memory being handled by my early 2009 Mac Pro than prior to switching to this.

Upgraded its single 2.66 GHz 4-core cpu to 3.46 GHz 6-core processor, and figured I'd take advantage of opportunity to use faster (1333MHz vs 1066Mhz it came with) memory allowed with the firmware update that basically turned the Mac Pro into the equivalent of a Mid 2010 model.

But nothing really changed, maybe just a teeny bit slower with the memory benchmarks. So either more memory made the small anticipated performance bump a wash, or perhaps the firmware update doesn't really take advantage of the faster memory speed after all with my hardware.

Regardless, if nothing else I now have more than twice the amount of memory I had before. The CPU bump has definitely perked things up, GUI behavior nice and smooth with Yosemite, though slightly better graphics card may also be helping with that. (Prior to all this, the early 2009 configuration I had was a bit sluggish overall and hesitated a bit here and there prior to doing some GUI activities. But no longer the case, mostly... getting Excel 2011 to do anything faster is apparently just never gonna happen.)

I would recommend this item to a friend! This review is from 32.0GB (4x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer
Reviewer: Anonymous Location: Laval, PQ Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Excellent September 13, 2015 Excellent , worked as expected, no issue what so ever, shipping was fast too.

PERFECT,

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) DDR3 ECC PC10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer
Reviewer: Anonymous Location: Montreal Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Extreme quality ! August 29, 2015 Everything was so well packed and it was : " Top quality " equipment. The shipping to Montreal was so fast. I ordered it Tuesday at 6:30 p.m.and received it Friday afternoon, around 4 p.m. With your new service, with Purolator, all the fees, border, taxes, etc.. are already paid, so it goes right to our door. I received it yesterday and installed it today. Everything seems to be fine.

I would recommend this item to a friend! This review is from 32.0GB (8x 4GB) DDR3 ECC PC10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer
Reviewer: Anonymous Location: sydney, nova scotia canada Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 great products, great people June 29, 2015 i trust your brand, you are my first stop!

the guy who helped out with my RAM installation was kind and patient!

i will shop with you again!

thanks!

matthew

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer
Reviewer: Anonymous Location: Maryland Age: 45-54 Experience Level: Power User Owned Product: 3-4 months
Rating: 5/5 Works fine June 23, 2015 Easy install and upgrade. Memory works great in Mac Pro.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) DDR3 ECC PC10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer
Reviewer: Anonymous Owned Product: 1-3 months
Rating: 5/5 excellent so far May 3, 2015 I upgraded the memory in my dual-six Mac Pro and have had no problems with the memory for a couple of months now. Using all banks is supposed to be slightly slower than sets of three, but I have not noticed that. What I have noticed is that it is faster now that I can have more disk cache.

I would recommend this item to a friend! This review is from 64.0GB (8x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer
Reviewer: Anonymous Owned Product: over 6 months
Rating: 5/5 worked flawlessly for 2 years May 3, 2015 I had this memory in my dual-six Mac Pro for two years and it worked flawlessly. I have replaced it with larger chips since I was starting to use up the 24G of ram.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Puerto Rico Age: 35-44 Experience Level: IT Professional Owned Product: 3-4 months
Rating: 5/5 BEST COMPANY IN THE MARCKET!!!!!!!!!!!! April 9, 2015 Worked Perfectly and reliable as always!!!!!!!!!!!!!!!!!!!!!!!! I had never had an issue!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I would recommend this item to a friend! This review is from 4.0GB (2x 2GB) DDR3 ECC PC10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer Top 250 Contributor
Reviewer: Anonymous Location: Ottawa, ON Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Excellent! March 20, 2015 Rather than buy a new computer I decided to upgrade the $#%t out of my 2010 Mac Pro. It worked. The thing sings now with all this RAM. I also put in a SSD boot drive.

This review is from 64.0GB (8x 8GB) DDR3 ECC PC3-10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.

Verified Buyer
Reviewer: Anonymous Location: Orange County, CA Age: 45-54 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Great product. Working just fine. February 17, 2015 OWC Staff was more than patient with me, as I had many many questions about memory configurations and what my best options were. On my BTO Mac Pro 12-core, the configurations and options are different. And they answered all my questions before I made the purchase.

I would recommend this item to a friend!

Verified Buyer Top 250 Contributor
Reviewer: Anonymous
Rating: 5/5 Worked as described. November 2, 2014 I would recommend this item to a friend!
Verified Buyer Top 250 Contributor
Reviewer: Anonymous
Rating: 5/5 Worked as described. November 2, 2014 I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) DDR3 ECC PC10600 1333MHz SDRAM ECC for Mac Pro 'Nehalem' & 'Westmere' models.
OWC Memory 24.0GB 6 x 4.0GB PC10600 DDR3 Kit Mfr P/N: 1333D3W4M24K OWC SKU: OWC1333D3W4M24K OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Same Day
Reviews (6)
only $135.99
Add to CartOther World Computing 1333D3W4M24K In Stock, Click to Buy Now
Additional Capacities & Kits: 1 x Module (Single)
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