Get exclusive deals delivered to your inbox!

Start saving today. »

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 (Early 2009 8-Core)
(March, 2009)
Model ID: MacPro4,1
2.26GHz, 2.66GHz, 2.93GHz
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.
PC Servers
PC Servers
Compatible with Intel / AMD Process based servers capable with the specifications listed above. Memory complies with JEDEC Specifications, document JESD79-3B.

Customer Ratings

Write a Review 4.9 / 5 24 out of 25 (96%) reviewers would recommend this product
1 2 3 4 5
Verified Buyer
Reviewer: wakeupscreaming
Rating: 5/5 Works great for Mac Pro Six Core Mid-2010 Westmere October 4, 2018 I bought a matched set (2x8GB) for my Mac Pro Mid 2010 3.46 GHz 6 Six Core Westmere. I've had the RAM now for more than a year with no issues. I have a total of 20GBs RAM, with 2x2GB in the other 2 slots.

I tried to find information on the maximum RAM for this Mac Pro model, and it's a little confusing. It's either 32GB or 48GB?

I would recommend this item to a friend! This review is from 16.0GB Mac Pro / Xserve 2009 Memory Matched Set (2x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Response from MacSales.com, Call Center October 9, 2018 Hello! The maximum RAM for the 6-core MacPro would be 48GB using 3x16GB sticks!
Verified Buyer
Reviewer: MacMANNewYorK Location: NEW YORK, NY Age: 35-44 Experience Level: Home User Owned Product: 3-4 months
Rating: 5/5 So Far So Good July 2, 2018 This 64gb Memory is pretty good for my 2009 Mac Pro Quad Core. Im satisfied so far. Hope they last a very long time!

I would recommend this item to a friend! This review is from 64.0GB Mac Pro Early 2009 Memory Matched Set (8x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: kneegrowe223 Location: New Zealand
Rating: 5/5 Great product! June 7, 2018 easy to install, and instantly felt the difference. thanks for the quick delivery for your New Zealand customers!

I would recommend this item to a friend! This review is from 32.0GB (8x 4GB) DDR3 ECC PC8500 1066MHz SDRAM ECC for Mac Pro & Xserve 'Nehalem' models. Customer Videos:

Verified Buyer
Reviewer: waynekhin Location: Singapore
Rating: 5/5 Keeps my old 2013 Mac Pro running perfectly. April 23, 2018 Max out the available slots with this set of SDRAM Modules. The pretty old Mac Pro is now running perfectly.

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Early 2009 Memory Matched Set (4x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: SalamanderJSH Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Powerful upgrade January 2, 2018 I bought these for a power and speed upgrade to my Mac Pro. Works great.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) DDR3 ECC PC8500 1066MHz SDRAM ECC for Mac Pro & Xserve 'Nehalem' models. Customer Videos:

Verified Buyer Top 50 Contributor
Reviewer: JimTheBrewer Location: Cape Canaveral, FL Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 More memory = more better December 17, 2017 Good memory, fast.

I would recommend this item to a friend! This review is from 16.0GB (4x 4GB) DDR3 ECC PC8500 1066MHz SDRAM ECC for Mac Pro & Xserve 'Nehalem' models. Customer Videos:

Verified Buyer Top 50 Contributor
Reviewer: JimTheBrewer Location: Cape Canaveral, FL Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Perfect replacement, easy install. December 17, 2017 More useable memory, enough said.

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Early 2009 Memory Matched Set (4x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: carcassolas
Rating: 5/5 Super happy November 25, 2017 The product was super quick to arrive at my home and it works without a problem. Recommend :)

I would recommend this item to a friend! This review is from 48.0GB Mac Pro / Xserve 2009 Memory Matched Set (6x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: Loco Location: Lausanne, Switzerland Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 So far so good October 24, 2017 Just installed the 32Gb ram and works perfectly well.

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Early 2009 Memory Matched Set (4x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: PhntmRob Location: NY Age: 55-65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Upgraded 2010 Mac Tower with RAM from MacSales September 22, 2017 I have an Mid 2010 Mac Pro tower and wanted to upgrade the RAM. Now have 24G Ram in my machine and it really made a difference speed.

I would recommend this item to a friend! This review is from 16.0GB Mac Pro / Xserve 2009 Memory Matched Set (2x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: bizpat Location: nc Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 From 8 to 32BG September 4, 2017 I boosted my older 2009 Mac Pro from 8 to 32 with these 4 sticks. A local store said I couldn't do that but it worked just fine. I had to upgrade because I had added a second monitor to my system and it was pulling too much memory and causing slow web loading. Easy peasy to install.

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Early 2009 Memory Matched Set (4x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: Quixote
Rating: 5/5 Product worked beautifully July 11, 2017 I would recommend this item to a friend! This review is from 32.0GB Mac Pro Early 2009 Memory Matched Set (4x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:
Verified Buyer Top 250 Contributor
Reviewer: Kuko Location: Calgary Age: Over 65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Mac Pro 2009 June 19, 2017 Works flawlessly, A+

I would recommend this item to a friend! This review is from 4.0GB Mac Pro Early 2009 Memory Matched Set (2x 2GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: DesignsByJonathan Location: SW FL Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Superfast 64 GB RAM upgrade June 6, 2017 Superfast 64 GB RAM upgrade on a Mac Pro 4,1 tower. Fast delivery, great price, like new machine handles video even better now. User error on install (RAM was not firmly seated correctly by me) and MacSales talked me through it. Highly recommended!

THANKS!

I would recommend this item to a friend! This review is from 64.0GB Mac Pro Early 2009 Memory Matched Set (8x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: MAC24X7 Location: El Dorado Hills, CA Age: Over 65 Owned Product: less than a month
Rating: 5/5 Always Dependable June 4, 2017 A client has an older Mac Pro quad-core tower server working flawlessly since new. I upgraded the RAM to the max of 16, up from the 6GB it shipped with. Also replaced the enterprise drives with SSDs. In a FileMaker server role, it is spectacular, serving up 8 million records. OWC always comes through. Been doing business with them forever.

This review is from 4.0GB DDR3 ECC PC8500 1066MHz SDRAM ECC for Mac Pro & Xserve 'Nehalem' models. Customer Videos:

Verified Buyer
Reviewer: JayRally Age: 35-44 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Perfect. May 4, 2017 I always order my RAM from MacSales.com. They always have quality products and I've never been disappointed with them.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) DDR3 ECC PC8500 1066MHz SDRAM ECC for Mac Pro & Xserve 'Nehalem' models. Customer Videos:

Verified Buyer
Reviewer: Dra45 Age: 45-54 Experience Level: Hobbiest Owned Product: 1-3 months
Rating: 5/5 Great memory April 19, 2017 The memory came on time,and I installed it in my 2009 Mac Pro in less than 5 minutes.It worked out great.

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Early 2009 Memory Matched Set (4x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: JackRecorder Location: Rhode Island Age: Over 65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Always delivers as expected! April 12, 2017 Hard to write a review on a product that works when installed and just keeps on working! Always pleased with anything from MacSales and encourage colleagues to shop there! Dependable to the max!

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Early 2009 Memory Matched Set (4x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer Top 250 Contributor
Reviewer: Bigdrum Location: Chicago Age: 55-65 Experience Level: Power User Owned Product: 5-6 months
Rating: 5/5 16.0GB Mac Pro / Xserve 2009 Memory Matched Set adds to your Mac! April 5, 2017 My 16.0GB Mac Pro / Xserve 2009 Memory Matched Set helps my Mac run better! Great deal and a great price to keep your Mac running smooth!

I would recommend this item to a friend! This review is from 16.0GB Mac Pro / Xserve 2009 Memory Matched Set (2x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: hanks Location: Central Oregon Age: Over 65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Excellent Product, Excellent Company February 19, 2017 No problems with the product. Not my first rodeo with MacSales. They are a great company and a pleasure to work with.

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Early 2009 Memory Matched Set (4x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: DCMac
Rating: 5/5 Excellent! January 30, 2017 Product and customer service were spot on, couldn't ask for anything better. I'm glad I chose MacSales.com!

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Early 2009 Memory Matched Set (4x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: midwestHawkeye Age: 45-54 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Helpful support... January 4, 2017 I accidentally installed the RAM I bought incorrectly, and the MacSales Tech person helped me determine what I had done wrong, and got my up and running ASAP. SUPER helpful people!!

I would recommend this item to a friend! This review is from 16.0GB Mac Pro / Xserve 2009 Memory Matched Set (2x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: Noodlegoober Location: Columbia, TN Age: 35-44 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Super easy to install and now the old Mac is snappy again! November 23, 2016 These memory sticks woke my mid-2010 Mac Pro up from sleepy town. For six years I put up with the stock 6GB of RAM and finally made the jump to light speed! I'm an audio professional and am impressed with what a difference this upgrade has made. Don't wait as long as I did. You won't regret it.

I would recommend this item to a friend! This review is from 32.0GB (8x 4GB) DDR3 ECC PC8500 1066MHz SDRAM ECC for Mac Pro & Xserve 'Nehalem' models. Customer Videos:

Verified Buyer
Reviewer: KevAtKL Location: KL, Mal Age: 25-34 Experience Level: IT Professional Owned Product: less than a month
Rating: 5/5 Product work as advertise! October 13, 2016 Easy to install, took less than 2 minutes to install on a Mac Pro 2012. To OWC : kindly seal the packaging before posting out. Previously all my purchase are seal with OWC sticker, this time it was not.

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Early 2009 Memory Matched Set (4x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: abr02 Location: Brazil Age: 25-34 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Just Perfect October 7, 2016 The memories are working pretty well, and my machine is now fast and furious. I didn`t imagine that it was possible to ressurrect my MacPro 2010 this way.

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Early 2009 Memory Matched Set (4x 8GB) PC-8500 1066MHz DDR3 ECC SDRAM Modules. Customer Videos:

OWC Memory 12.0GB 6 x 2.0GB PC8500 DDR3 Kit Mfr P/N: 85MP3E2M12GK OWC SKU: OWC85MP3E2M12GK OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Pending only $89.95
Add to CartOther World Computing 85MP3E2M12GK, Click to Buy Now
Additional Capacities & Kits: 1 x Module (Single)
  • 2GB
    • Ships: Same Day
    • Only $15.99
    • $15.99
  • 4GB
    • Ships: Same Day
    • Only $25.99
    • $25.99
  • 8GB
    • Ships: Same Day
    • Only $38.99
    • $38.99
2 x Module Kits
  • 4GB
    • Ships: Same Day
    • Only $31.98
    • Matched Kit for $29.99
  • 8GB (2x4)
    • Ships: Same Day
    • Only $51.98
    • Matched Kit for $47.99
  • 16GB (2x8)
    • Ships: Same Day
    • Only $77.98
    • Matched Kit for $67.99
3 x Module Kits
  • 24GB (3x8)
    • Ships: Same Day
    • Only $116.97
    • Matched Kit for $99.97
  • 12GB (3x4)
    • Ships: Same Day
    • Only $77.97
    • Matched Kit for $69.99
  • 6GB (3x2)
    • Ships: Same Day
    • Only $47.97
    • Matched Kit for $44.98
4 x Module Kits
  • 32GB (4x8)
    • Ships: Same Day
    • Only $155.96
    • Cyber Saver $129.99
  • 16GB (4x4)
    • Ships: Same Day
    • Only $103.96
    • Matched Kit for $91.99
  • 8GB (4x2)
    • Ships: Same Day
    • Only $63.96
    • Matched Kit for $59.97
6 x Module Kits | 8/12 Core Only
  • 24GB (6x4)
    • Ships: Same Day
    • Only $155.94
    • Matched Kit for $135.99
  • 12GB (6x2)
  • 48GB (6x8)
    • Ships: Same Day
    • Only $233.94
    • Matched Kit for $189.99
8 x Module Kits | 8/12 Core Only
  • 32GB (8x4)
    • Ships: Same Day
    • Only $207.92
    • Matched Kit for $179.00
  • 64GB (8x8)
    • Ships: Same Day
    • Only $308.75
    • Matched Kit for $249.00
  • 16GB (8x2)
    • Ships: Pending
    • Only $127.92
    • Matched Kit for $117.99