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8.0GB OWC Memory Upgrade

8.0GB PC8500 DDR3 ECC-R 1066MHz 240 Pin
Perfect for the Mac Pro 8-core / Quad-core Xeon systems!
Memory Image
Product Specs:
OWC Memory for Mac Pro Quad Xeon fully meets Apple's specifications with special attention to proper thermal specifications.
IMPORTANT OWC NOTE:
OWC p/n OWC8566D3MPE8GB 8GB modules require that all installed modules be of this same matching part. Other existing Apple or 3rd party 1GB, 2GB and 4GB modules are not supported for use with this kit and need to be removed when this kit is added.
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.
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
Verified Buyer
Reviewer: Jon22 Age: 25-34 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Smooth Upgrade - One Catch December 12, 2018 Order shipped fast and was correct. One catch is these 16GB modules can not be mixed with disparate size modules so I couldn't use existing RAM. My bad as it was listed on the site but I did not see it the first time around. Machine wouldn't boot. I removed the 4x2GB DIMM's and everything worked fine. Live and learn. Also want to Thank OWC for great customer service. When I came back to see what the issue may be with my system I noticed a $30 drop in the memory I had purchased. I called the next day and they price adjusted my order no questrions asked. Am writing this review while returning for another purchase. Highly recommended.

I would recommend this item to a friend! This review is from 64.0GB Mac Pro Early 2009 Memory Matched Set (4x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: IAmTheWind Location: Boulder, CO Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Gave my 2010 Mac Pro a new lease on life May 21, 2018 My original 10GB of memory was fine for several years but with the onset of processing large files such as RAW images, my beloved mid-2010 Mac Pro had been suffering. The OS X Memory Cleaner app had been indicating up to 99% of used memory and the machine was crawling.

The installation of 32GB of OWC memory speeded up operation of my computer remarkably and Memory Cleaner now usually shows only 30-40% used memory.

I've been a happy OWC customer since 2006 and I'm thinking that my next purchase is likely to be an additional 32GB of memory.

Thanks for the new lease on life, OWC!

I would recommend this item to a friend! This review is from 32.0GB Mac Pro / Xserve 2009 Memory Matched Set (2x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: Research
Rating: 5/5 This product was exactly what we were looking for. February 19, 2018 I would recommend this item to a friend! This review is from 16.0GB DDR3 ECC-R PC8500 1066MHz SDRAM ECC for Mac Pro & Xserve 'Nehalem' models. Customer Videos:
Verified Buyer
Reviewer: Bean Location: Marrero. La. Age: 55-65 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 This product provided ease of installation. February 19, 2018 This product provided a memory upgrade that I needed and aided in better performance of my computer.

I would recommend this item to a friend! This review is from 48.0GB Mac Pro / Xserve 2009 Memory Matched Set (3x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: CreativeDude Location: Paris, France Age: 35-44 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Awesome January 4, 2018 My mid-2010 8-core Mac Pro is an audio / video production tool so the 12Gb of RAM it came with were bottlenecking the speed of some tasks. Ordering 64 Gb from OWC was the best decision ever ! The whole experience from ordering to delivery and installing was flawless !

I now have a brand new computer, unexpected for a 7 year-old computer.

I would recommend this item to a friend! This review is from 64.0GB Mac Pro Early 2009 Memory Matched Set (4x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: amenegoni Location: Boston Age: 25-34 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Perfect December 26, 2017 The product I ordered was exactly which was shown. Works really well. I love the blue color of the heat spreader! Thanks OWC!

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

Verified Buyer Top 250 Contributor
Reviewer: 377Ohm Location: Lausanne, Switzerland Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Excellent RAM product at a very affordable price December 16, 2017 I have been using this RAM upgrade for over a month in my 2010-vintage Mac Pro, both under macOS 10.12.6 and Win 7. I have experienced no problems whatsoever. In short, this a no-hassle, quality RAM upgrade at a modest, very affordable price. I wholeheartedly recommend the product to all whose "cheese grater" Mac Pro keeps running strong and can benefit from more RAM.

I would recommend this item to a friend! This review is from 128.0GB Mac Pro Early 2009 Memory Matched Set (8x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: MacProlate2009 Location: Indianapolis, IN Age: 45-54 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Works like a charm July 16, 2017 I probably got more RAM than I will ever need, but then we always say that and then want more a few years later as technology advances. in any event this really sped up my aging Mac Pro for loading and multitasking. I was a little incredulous that it would make this much difference in an old machine - but it i did. I have not had this installed long, so I cannot comment on the durability of this product.

I would recommend this item to a friend! This review is from 128.0GB Mac Pro Early 2009 Memory Matched Set (8x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: DennisNG
Rating: 5/5 The 48 GB Mac Pro for my 2010 work perfectly February 13, 2017 Well, I wish for 64 GB but that is the maximum I can do.

I would recommend this item to a friend! This review is from 48.0GB Mac Pro / Xserve 2009 Memory Matched Set (3x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: MultiMacUser Location: Indianapolis Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Faster!! November 17, 2016 This OWC matched RAM for our MacPro Tower (combined with a Mercury Extreme Pro 6G SSD) has given us a new, super fast computer!! Many thanks to MacSales for making it such a user-friendly upgrade experience. I can't see how it could have been easier!

I would recommend this item to a friend! This review is from 48.0GB Mac Pro / Xserve 2009 Memory Matched Set (3x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules. Customer Videos:

Verified Buyer
Reviewer: Anonymous Location: New York City Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Excellent upgrade May 7, 2016 Some perspective: in 1995, I was thrilled when my overlords at work allowed me to upgrade from a IIci to a PowerMac 7500 with a whopping 48 MB of RAM. The two additional 16MB DIMMs added about $1100 to the cost of the 7500. For about a fourth of that amount, I now have 48GB (!!) installed in my 2010 Mac Pro.

I had originally planned to go from my previous 24GB to 32GB either by adding another 8GB DIMM or replacing the current 8GB DIMMs with a pair of 16GB DIMMs; after deciding on the latter approach, I decided to avoid the possible pitfalls of trying to add a 16GB DIMM at some point in the future that might not match a pair of 16GB DIMMs purchased now. It's overkill for some of what I do, but it makes a big difference if you want to run Virtual Machines. Allocating 8GB to my current VMs has produced a noticeable improvement in performance.

I would recommend this item to a friend! This review is from 48.0GB Mac Pro / Xserve 2009 Memory Matched Set (3x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules.

Verified Buyer
Reviewer: Anonymous Location: Tennessee Age: Over 65 Experience Level: Hobbiest Owned Product: 1-3 months
Rating: 5/5 RAM upgrade February 12, 2016 After talking with representative of MacSales.Com was able to upgrade my MacPro with the correct amount RAM. He walked me through the process. The delivery came immediately and was easy to install. And, it has made my Photoshop workflow possible. Before the upgrade my Photoshop would crash if I opened any large photo to work on. I recommend MacSales.Com to anyone who owns a Mac (of any kind) and needs parts. Great company, great service.

I would recommend this item to a friend! This review is from 128.0GB Mac Pro Early 2009 Memory Matched Set (8x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules.

Verified Buyer Top 100 Contributor
Reviewer: Anonymous
Rating: 5/5 Perfect RAM for a Mac Pro Running Multiple VMs September 9, 2015 Absolutely no problems over the nearly 3 years I've had it.

I would recommend this item to a friend! This review is from 32.0GB Mac Pro / Xserve 2009 Memory Matched Set (2x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules.

Verified Buyer Top 250 Contributor
Reviewer: Anonymous Location: ohio Age: Over 65 Experience Level: Power User Owned Product: 5-6 months
Rating: 5/5 Fantastic service and timely rebate May 9, 2015 Fantastic service and timely rebate

I would recommend this item to a friend! This review is from 48.0GB Mac Pro / Xserve 2009 Memory Matched Set (3x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules.

Verified Buyer Top 100 Contributor
Reviewer: Anonymous Location: Wichita, KS Age: 55-65 Experience Level: IT Professional Owned Product: 3-4 months
Rating: 5/5 No issues February 22, 2015 After a quick and easy installation, the memory modules have worked perfectly. No issues of any kind. It's great to have the extra memory available.

I would recommend this item to a friend! This review is from 64.0GB Mac Pro Early 2009 Memory Matched Set (4x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules.

Verified Buyer
Reviewer: Anonymous Location: North Owned Product: 3-4 months
Rating: 5/5 Works. Fast delivery. Easy. November 9, 2014 not sure what to say, but OWC was helpful and speedy, no issues with anything I've every bought from them. It's memory. It worked well.

I would recommend this item to a friend! This review is from 16.0GB DDR3 ECC-R PC8500 1066MHz SDRAM ECC for Mac Pro & Xserve 'Nehalem' models.

Verified Buyer
Reviewer: Anonymous Location: Switzerland Age: 45-54 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 It works February 27, 2014 Installation was explained well and the chips seem to do just what is expected from them (for more than 1 year now). MacPro is running most of the time and sometimes under heavy load.

I would recommend this item to a friend! This review is from 96.0GB Mac Pro / Xserve 2009 Memory Matched Set (6x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules.

Verified Buyer
Reviewer: Oliver Location: Riyadh, Saudi Arabia Age: 25-34 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 "OWC it has the highest quality of product in new technology" October 2, 2012 "I did extensive research of memory (RAM) for my Mac Pro and I picked the OWC it has the highest quality of product in new technology. Really great services. I bought 32.0GB Mac Pro / Xserve 2009 Memory Matched Set (16GB x 2) PC-8500 1066MHz DDR3 ECC SDRAM Modules from OWC working excellent on my Mac Pro. I got it within 7 days (fast ship to Saudi Arabia via FedEx) I'm very happy now, Well worth the price, Thanks to OWC 10 Times."

I would recommend this item to a friend! This review is from 32.0GB Mac Pro / Xserve 2009 Memory Matched Set (2x 16GB) PC-8500 1066MHz DDR3 ECC-Registered SDRAM Modules.

Verified Buyer
Reviewer: Jiggy Location: Lisboa, Portugal Age: 25-34 Experience Level: IT Professional Owned Product: less than a month
Rating: 5/5 Mac Pro 2.66 Ghz Quad-Core Intel Xeon January 12, 2012 I had 3gb (3x1gb) on Mac Pro 2.66Ghz Quad-Core Intel Xeon (Nehalem) Now i get just one of this 8Gb and on Geekbench it makes less score but is more faster working. Don't care about Geekbench, because is more faster now with 1x8Gb. I notice more quickly working with all program's! Even the temperature of the CPU is lower! (less temperature = less rpm + less noise = durability) great's from Portugal!

I would recommend this item to a friend!

OWC Memory 8.0GB 8.0GB PC8500 DDR3 Module Mfr P/N: 8566D3MPE8GB OWC SKU: OWC8566D3MPE8GB OWC Memory Upgrade Lifetime OWC Limited Warranty Ships: Same Day only $34.99
Add to CartOther World Computing 8566D3MPE8GB In Stock, Click to Buy Now
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