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4.0GB OWC Memory Upgrade Kit

Matched pair, 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.
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.
OWC is proud to offer the best possible Mac Pro Memory solutions available.
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Pictured above: Proper Apple Qualified heat-spreaders.
See the difference between
Apple's qualified modules and those that are not!
Premium Quality Modules fully Mac Pro Qualified and backed by OWC Memory Lifetime Limited Warranty including Advanced Replacement Program.

These OWC memory modules fully meet/exceed Apple's Mac Pro Quad & 8-Core Xeon model memory specifications. Utilization of qualified Apple Mac Pro Heat-Spreaders, Apple Qualified IDT AMBs, and the best major brand memory components ensure maximum performance and trouble-free operation. Modules are fully tested prior to shipment.


Apple specifically designed the Mac Pro with more space between each slot to accommodate the Apple Proprietary Heat-Spreader for thermal requirements. Use of Apple's spreader solution and the highest grade, thermally tolerant components ensure that these Mac Pro Quad Xeon Memory Upgrade Kits will provide a lifetime of reliable and trouble-free operation.

Apple notes that using parts with a non-Apple standard heat-spreader and which only meet JEDEC standard specifications can result in higher fan speeds due to increased internal temperatures and system controlled reduction of memory performance to prevent thermal overload. OWC's testing has found that use of non Apple qualified spec modules leads to ECC errors and ultimate system lock ups as non-spec modules reach significantly higher temperatures.

Two well known memory manufacturers originally listed their own JEDEC standard modules as being Mac Pro compatible. Within days of doing so, each removed this compatibility support after reports and testing which made clear JEDEC standard modules were not reliable in the Mac Pro. It is very disappointing that many other memory providers continue to list and misrepresent such JEDEC modules (lacking the proper heat-spreader) as being correct for the Mac Pro.

The Apple Mac Pro is an amazing machine. Memory from OWC only makes it better!
This OWC Memory is compatible with... Learn how to find your Mac's model ID or PC specs
Mac Pro
Mac Pro (Early 2008)
(January, 2008)
Model ID: MacPro3,1
2.8GHz, 3.0GHz, 3.2GHz

Customer Ratings

Write a Review 4.8 / 5 10 out of 11 (91%) reviewers would recommend this product
Verified Buyer
Reviewer: Anonymous Location: Maple Valley, Wa Age: Over 65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Worked Great September 27, 2015 OWC's memory boards works just like their supposed to, and works a long time. I've never had a problem with any of OWC's Memory. I recommend, however that you use OWC's support system to make a correct choice. I didn't a couple of time and regretted it.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: British Columbia Age: 55-65 Experience Level: Home User
Rating: 5/5 Added ram very good March 26, 2015 I would recommend this item to a friend!
Verified Buyer
Reviewer: Anonymous Location: Reno, NV Age: 45-54 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 RAM works great! March 23, 2015 These guys carry great, high quality products you can count on, and have great customer service. Highly recommended.

I would recommend this item to a friend!

Verified Buyer Top 100 Contributor
Reviewer: Anonymous Location: Nova Scotia Age: 55-65 Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 still kicking! February 19, 2015 memory sticks still hard at work

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Milwaukee, WI Age: 55-65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Best Customer Service Ever January 27, 2015 I had a 5 year old OWC ram module go bad, OWC quickly sent a replacement which worked but did not match the others close enough (because of the big time span I suspect) to allow all the modules to be recognized. OWC diagnosed the problem and replaced the other OWC modules without charge to insure a perfect match. Problem solved and service well beyond my expectations. This company stands behind their products. Thanks OWC.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: South Carolina Age: 45-54 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 second set of ram January 9, 2015 the first set of RAM FB-Dimms I ordered for my 2008 Mac Pro unfortunately was DOA but with the easy RMA replacement system I was able to send the ram set back and a new set was dispatched and works perfectly! Thanks!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Age: Over 65 Experience Level: Power User Owned Product: 5-6 months
Rating: 5/5 Great memory September 5, 2014 OWC has done it again. The products and services they give in next to none. This memory has been great with absolutely no problem. Thanks.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Florida Age: Over 65 Experience Level: Power User Owned Product: 1-3 months
Rating: 3/5 Memory failure June 30, 2014 Memory sticks failed within one month of purchase. I re-ordered and sent the failed units back, shier RMA process was very easy to follow..

Response from MacSales.com, Marketing July 1, 2014 We're sorry you had issues with the first set of modules shipped to you. As with any electrical component, the occasional failure is not out of the ordinary. All OWC Memory meets or exceeds all manufacturer specifications and is rigorously in-house lab tested to ensure superior quality, compatibility and reliability. That's why our memory is backed by industry-leading lifetime advanced replacement warranty. As you experienced, if you need your OWC memory replaced, we will ship to you same day.
Verified Buyer Top 250 Contributor
Reviewer: Anonymous Location: Finland Age: 25-34 Experience Level: IT Professional Owned Product: over 6 months
Rating: 5/5 High quality memory for older mac February 21, 2014 High quality memory for older mac. I Recommend this for all older mac pro owners.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Simi Valley, CA Age: 55-65 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Affordable RAM January 15, 2014 Owning a Mac Pro that I purchased in early 2008, I used to go to the Apple Store to try to buy RAM for it. They never had it...so, a friend told me about Other World Computing / MacSales, and I found exactly what I needed. The RAM works great, and I'm really happy I now have a place to find the accessories I need for an older Mac.

I would recommend this item to a friend!

OWC Memory 4.0GB 2 x 2.0GB Kit PC6400 DDR2 Mfr P/N: 64FB2MPK04GB MacSales.com SKU: OWC64FB2MPK04GB OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Same Day Only $79.98Matched Kit for $74.99
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