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16.0GB 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 6 out of 6 (100%) reviewers would recommend this product
Verified Buyer
Reviewer: Anonymous Location: Overland Park, KS Age: 45-54 Experience Level: Power User Owned Product: 3-4 months
Rating: 5/5 Should have purchased the full 32GB November 27, 2015 My MacPro (Early 2008) had 4x2GB modules giving me 8GB. I was running out of memory for some of my music apps. I had read about heating and fan issues with a fully loaded MP as old as mine. So I opted for upgrading with 4x4GB FD-DIMMS figuring I could always get rid of the older 8GB I had. I now have 24GB and I haven't noticed any thermal changes at all with my system. I'm sure it runs a little hotter, but I haven't noticed fans kicking in. The setup really rocks now should extend the life of my MP another couple of years. Having the extra 16GB now allows me to load a huge amount of samples into RAM. I had to really go out of my way to start swapping to HD with 24GB. That being said I will probably get rid of the 4x2GB modules at some point and put in a full 32GB seeing that heat isn't going going to be an issue. (MacPro Early 2008 MacPro3,1, 2x2.8GHz Quad-Core Xeon, 24GB 800MHz FB-DIMM, 512GB PCI SSD, 4x3TB 7200RPM WD3000)

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous
Rating: 5/5 Works perfectly, not inexpensive December 15, 2014 I have been an OWC customer for a long time, and rely on the quality of OWC products. These memory modules cost about double what similar ones cost on Amazon, but I know if there is a problem, OWC will stand behind them.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Jeremy70 Location: Mexico Age: 35-44 Experience Level: IT Professional Owned Product: less than a month
Rating: 4/5 great option August 13, 2014 this upgrade is a great option for Mac Pro. For news OS X versions is necessary more ram.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Michigan Age: Over 65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Works Great August 13, 2014 I had been meaning to upgrade my RAM for years. I wish I hadn't waited so long – although the prices I'm sure are better now than they would have been a few years back. Now my Old MacPro hums along the way it always should have. I've also purchased a number of OWC drives over the last 20 years and they all keep churning along. I'm a devoted OWC shopper.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Renton, WA Age: Over 65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Easy to Do May 30, 2014 Really easy to find the right memory, the right size and it was shipped quickly and well packed. Very pleased with the purchase. Will buy again soon.

I would recommend this item to a friend!

Verified Buyer
Reviewer: oogieboogie Location: Gold Coast, Australia Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Great Response to a Problem August 9, 2011 I bought 16GB RAM in 4x4GB modules in matched pairs. After about 30 days one pair failed and I requested a return The response was immediate. I returned the faulty 2 modules and within a few days I have notification of them being replaced I am in Australia and you couldn't ask for better service than that Thank you OWC I have dealt with you for about 5 years now and this is why.

I would recommend this item to a friend!

OWC Memory 16.0GB 4 x 4.0GB Kit PC6400 DDR2 Mfr P/N: 64FB4MPK16GB OWC SKU: OWC64FB4MPK16GB OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Same Day Only $295.96Matched Kit for $259.99
Add to CartOther World Computing 64FB4MPK16GB In Stock, Click to Buy Now