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24.0GB 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.
8
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 4-Core (Early 2008)
(January, 2008)
Model ID: MacPro3,1
2.8GHz
Mac Pro
Mac Pro 8-Core (Early 2008)
(January, 2008)
Model ID: MacPro3,1
2.8GHz, 3.0GHz, 3.2GHz

Customer Ratings

Write a Review 4.9 / 5 19 out of 19 (100%) reviewers would recommend this product
1 2
Verified Buyer
Reviewer: LuisM Location: Fort Worth, TX Age: 55-65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Perfect Again! August 10, 2020 New RAM work perfectly. No issues with performance or installation.

I would recommend this item to a friend! This review is from 16.0GB Mac Pro Memory Matched Pair (2x 8GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules. Customer Videos:

Verified Buyer
Reviewer: jefcotech Location: Birmingham AL
Rating: 5/5 As advertised August 4, 2020 Memory arrived on time and was easily installed. A great way to extend the life of my Mac Pro 2008.

I would recommend this item to a friend! Customer Videos:

Verified Buyer Top 250 Contributor
Reviewer: jb606 Location: Chicago, IL. Age: 35-44 Experience Level: IT Professional Owned Product: over 6 months
Rating: 5/5 Solid RAM July 27, 2020 Solid RAM. Reliable and competitively priced.

I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules. Customer Videos:

Verified Buyer
Reviewer: DeniseZ Location: Fort Collins, CO Age: 55-65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Reasonably priced, easy to install August 30, 2019 Needed more RAM for my graphics programs and upgrading to El Capitan on my old Early 2008 Mac Pro. Didn’t realize I had only 3GB RAM originally installed when I bought the machine. Perfect time to add a new hard drive and install more RAM! Easy to install. Love that the web site tells you what is compatible for each specific computer model.

I would recommend this item to a friend! Customer Videos:

Verified Buyer
Reviewer: StratOcaster Location: Texas Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Good quality and reliable. October 31, 2018 I had the stock 4 X 1Gb sticks in my 2008 Mac Pro 3,1 for YEARS, no issues. Until last month. Then one of the DIMMs went wonky on me. No surges or dips, no recent moves, it just went south. The machine would try to boot, then conk out before login. Took me a while to diagnose the problem, since the old RAM passed the POST. It just wouldn't boot El Capitan, even though Mavericks would boot on another drive.

These 2 X 8Gb sticks looked OEM, had the heavy-duty heat sinks, and now the machine is fine again -- even snappier in responsiveness (which I guess is to be expected since it's using NO swap now).

I would recommend this item to a friend! This review is from 16.0GB Mac Pro Memory Matched Pair (2x 8GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules. Customer Videos:

Verified Buyer
Reviewer: JohnK Location: Adelaide, South Australia Age: 45-54 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Our old Mc Pro has more RAM than ever ! October 21, 2018 Thank you very much OWC, we live in Australia and the RAM was received promptly after ordering it. We installed the new 8 GB modules and we now have 64 GB of RAM on our 2008 Mac Pro. Works like a treat. Thanks again.

I would recommend this item to a friend! This review is from 64.0GB Mac Pro Memory Matched Pair (8x 8GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules. Customer Videos:

Verified Buyer
Reviewer: Betty Location: Nebraska Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Very satisfied October 19, 2017 Ram goes in smoothly and shows up just as it should.

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Memory Matched Pair (4x 8GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules. Customer Videos:

Verified Buyer
Reviewer: AMHK Location: HKSAR
Rating: 5/5 Quick & sure solution for failed memory June 30, 2017 Recently 24/32 GB of my MacPro 3,1 failed. I immediately ordered a full set of 32GB memory and MacScale promptly delivered the new functional memory to me and relieve my worry that the remaining 8GB may die any time making my workhorse Mac down completely. My Mac is now running fine and speed resumed.

I would recommend this item to a friend! This review is from 32.0GB Mac Pro Memory Matched Pair (8x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules. Customer Videos:

Verified Buyer
Reviewer: sidewalkskeptic
Rating: 5/5 Worked perfectly November 30, 2016 Went right in no problems and mow I have more memory on my old MAC !

This review is from 16.0GB Mac Pro Memory Matched Pair (4x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules. Customer Videos:

Verified Buyer
Reviewer: SAHDIGITAL Location: HANTSPORT CANADA Age: 35-44 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 The Only Memory we trust in our Macs August 22, 2016 The Only Memory we trust in our Macs. Perfect Match!

I would recommend this item to a friend! This review is from 16.0GB Mac Pro Memory Matched Pair (2x 8GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules. Customer Videos:

Verified Buyer
Reviewer: Chip Location: San Diego Age: 55-65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Mac Pro 2008 new life August 14, 2016 Now that it's running El Capitan, my 2008 (version 3,1) Mac Pro was barely working, but after doubling the memory (to 8 GB from 4 GB) it's a new machine again.

I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules. Customer Videos:

Verified Buyer
Reviewer: Anonymous Location: California Age: Over 65 Experience Level: Hobbiest Owned Product: over 6 months
Rating: 5/5 Cheapest, easiest upgrade possible. June 14, 2016 Absolutely the best investment you can make for a slow computer is a memory upgrade. It can seem scary, but MacSales and Apple make it easy. First, Apple KNEW you'd want to do it. So they put the memory slots on nice slide-out boards which are easy to access. Second, MacSales provides easy access to the information on what your particular model needs. All you need supply is a tiny bit of time, and a little courage (Yes, the inside of your magic machine can be scary.) Seriously, this is a blue chip investment in your computer.

I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

Verified Buyer
Reviewer: Anonymous Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Best memory for my Mac March 15, 2016 I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.
Verified Buyer
Reviewer: Anonymous Location: Maryland Experience Level: IT Professional Owned Product: 3-4 months
Rating: 5/5 Solid RAM Upgrades December 28, 2015 I wouldn't go anywhere else.

I would recommend this item to a friend! This review is from 16.0GB Mac Pro Memory Matched Pair (2x 8GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

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! This review is from 16.0GB Mac Pro Memory Matched Pair (4x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

Verified Buyer
Reviewer: Anonymous Location: Gaston, Oregon Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 I am sure they are good... July 18, 2015 However I never got to use them. My computer fried before they were put to use. I now have a computer that does not use these Sticks. So much for saving a dollar. I ate that mess. But sticks are still brand new. And good!

I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

Verified Buyer
Reviewer: Anonymous Age: Over 65 Experience Level: Home User
Rating: 5/5 Memory June 15, 2015 Everything worked GREAT!!!!

I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

Verified Buyer
Reviewer: Anonymous Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 works great May 29, 2015 I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.
Verified Buyer Top 250 Contributor
Reviewer: Anonymous Location: Norway Age: 55-65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Execelent, very good product and support April 23, 2015 I can recomend your products from others buyers, very good support also. Can absolute recomend to buy from OWC

I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

Verified Buyer
Reviewer: Anonymous Location: San Francisco Age: 55-65 Experience Level: Power User Owned Product: over 6 months
Rating: 4/5 No problem so far April 13, 2015 All seems to be working. Purchased over a year ago.

I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

Verified Buyer Top 100 Contributor
Reviewer: Anonymous Location: Nova Scotia Age: 55-65 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 great product February 19, 2015 My original shipment was 'lost' in the mail - thanks CanadaPost :-( - but OWC was extremely helpfull in getting me a replacement

I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

Verified Buyer
Reviewer: Anonymous Location: Finland
Rating: 5/5 works great with early 2008 Mac Pro December 22, 2014 Some of my memory brokedown, so i had to find new memory.. this packed was on good price, so i got to have one.. I got much more power for my old computer.

I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

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! This review is from 16.0GB Mac Pro Memory Matched Pair (4x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

Verified Buyer
Reviewer: Anonymous Location: Tucson, AZ Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 On time delivery and works nicely September 25, 2014 I received my order on time (actually a bit faster than predicted), put it into my Mac Pro, and it worked perfectly.

I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

Verified Buyer
Reviewer: Anonymous Location: Birmingham, AL Age: 35-44 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Great upgrade for my MacPro August 16, 2014 This has been a great addition to my MacPro.

I would recommend this item to a friend! This review is from 8.0GB Mac Pro Memory Matched Pair (2x 4GB) PC6400 DDR2 ECC 800MHz 240 Pin FB-DIMM Modules.

OWC Memory 24.0GB 6 x 4.0GB Kit PC6400 DDR2 Mfr P/N: 64FB4MPK24GB OWC SKU: OWC64FB4MPK24GB OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Same Day Only $299.94Matched Kit for $249.99
Add to CartOther World Computing 64FB4MPK24GB In Stock, Click to Buy Now
Additional Capacities & Kits: 4GB Modules
  • 8GB (2x4GB)
    • Ships: Same Day
    • Only $99.98
    • Matched Kit for $94.99
  • 16GB (4x4GB)
    • Ships: Same Day
    • Only $199.96
    • Matched Kit for $179.99
  • 24GB (6x4GB)
  • 32GB (8x4GB)
    • Ships: Same Day
    • Only $399.92
    • Matched Kit for $319.99
8GB Modules
  • 16GB (2x8GB)
    • Ships: Same Day
    • Only $199.94
    • Matched Kit for $169.99
  • 32GB (4x8GB)
    • Ships: Pending
    • Only $399.88
    • Matched Kit for $339.88
  • 48GB (6x8GB)
    • Ships: Pending
    • Only $599.82
    • Matched Kit for $519.00
  • 64GB (8x8GB)
    • Ships: Pending
    • Only $799.76
    • Matched Kit for $649.00