Quality Solutions. Expert Support. Since 1988.

12.0GB OWC Memory Upgrade Kit

Memory Image
Product Specs:
OWC Memory for Mac Pro Quad 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.
*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 8-Core (Mid 2010)
(July, 2010)
Model ID: MacPro5,1
2.4GHz
Mac Pro
Mac Pro (Mid 2010 Quad-Core)
(July, 2010)
Model ID: MacPro5,1
2.8GHz, 3.2GHz, 3.33GHz
Mac Pro
Mac Pro (Early 2009 8-Core)
(March, 2009)
Model ID: MacPro4,1
2.26GHz, 2.66GHz, 2.93GHz
Mac Pro
Mac Pro (Early 2009 Quad-Core)
(March, 2009)
Model ID: MacPro4,1
2.66GHz, 2.93GHz, 3.33GHz
Xserve Intel
Xserve 8-Core (Early 2009)
(April, 2009)
Model ID: Xserve3,1
2.26GHz, 2.66GHz, 2.93GHz
Xserve Intel
Xserve Quad-Core (Early 2009)
(April, 2009)
Model ID: Xserve3,1
2.26GHz
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 4 out of 4 (100%) reviewers would recommend this product
Verified Buyer
Reviewer: Anonymous
Rating: 5/5 Worked fine November 12, 2015 Bought this in 2011 to add 12GB memory to my early 2009 Mac Pro, so total of 14GB. Worked fine for several years. Then I decided to swap out its cpu for a faster one and put in more and allegedly faster memory... probably shouldn't have bothered, as this memory benchmarks as faster.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Fresno, CA Age: 55-65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Good Quality Works Great August 29, 2015 I upgraded my MacPro from the 3GB factory minimum to 12.0GB (3x 4GB) DDR3 ECC PC8500 1066MHz SDRAM ECC for Mac Pro & Xserve 'Nehalem' models purchased here at OWC. They have worked without problems since installation and have made my Mac Pro work fast and allows me to have multiple programs open simultaneously.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Colorado Age: Over 65 Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 trouble free upgrade August 6, 2015 Items shipped quickly and arrived safely. RAM installed easily (2009 Mac Pro) and absolutely NO problems in months of use!

I would recommend this item to a friend!

Verified Buyer Top 100 Contributor
Reviewer: oguza Location: Israel
Rating: 5/5 Flawless, cheap and fast December 9, 2012 Since RAM is very expensive in the Apple stores, I started using OWC's RAM. It's half the price and working just as well as apple RAM. Recommended to all :-)

I would recommend this item to a friend!

OWC Memory 12.0GB 3 x 4.0GB PC8500 DDR3 Kit Mfr P/N: 85MP3W4M12GK OWC SKU: OWC85MP3W4M12GK OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Same Day Only $71.64Matched Kit for $62.99
Add to CartOther World Computing 85MP3W4M12GK In Stock, Click to Buy Now