Upgrade the memory in select 2009-2012 Mac Pro systems using the OWC 64GB DDR3 1333MHz UDIMM Kit for Mac Pro 2009-2012from OWC / Other World Computing. This memory kit features a total capacity of 64GB, which is made up of eight 8GB modules. It also has a clock speed of 1333 MHz, a bus speed of PC-10600, and a 240-pin UDIMM form factor. It operates using 1.5V, has a CAS Latency of 9-9-9-24, a component configuration of 1024M x 72, a module bandwidth of 10.6 GB/s, and is equipped with ECC technology. By offering ECC (Error Checking and Correcting) technology, this RAM will help your workstation encounter fewer errors that can corrupt data sets and introduce system issues. Additionally, this memory module is compatible with Apple Specified Thermal Sensor, which ensures that the RAM maintains a safe thermal operating range.

To utilize over 32GB of memory in your Mac Pro using 10.6.x or greater, you must boot into 64-bit mode. In 32-bit mode, all installed memory will show in the system profiler, but only up to 32GB will be actively used by the computer.

64GB (8 x 8GB) Capacity    1333 MHz Clock Speed    PC-10600    240-pin UDIMM    1.5V    CAS Latency 9-9-9-24    ECC    Apple Thermal Sensor Compatible    Module Bandwidth: 10.6 GB/s    Compatible with the Select Mac Pros

Model ID: MacPro4,1

2.26 GHz, 2.66 GHz, 2.93 GHz

Model ID: MacPro5,1

2.4 GHz

Model ID: MacPro5,1

2.40 GHz, 2.66 GHz, 2.93 GHz, 3.06 GHz

Compatible with Intel / AMD Process based PCs capable with the specifications listed above. Memory complies with JEDEC Specifications, document JESD79-3B

Related Questions and Answers

Q: 1. Can i use this in my Asus motherboard that support DDR3 133MHz?

A: The RAM is compatible with Intel / AMD Process based PCs capable with the specifications listed above. Memory complies with JEDEC Specifications, document JESD79-3B

Q: 2. Are these actually UDIMM? OWC's website shows them as Registered (aka RDIMM)

A: These are RDIMM's.

Q: 3. This is not an ECC type, but will it work on MacPro late 2013?

A: This memory is ECC memory and is made for the 2013 Mac Pro, but it is Registered memory which cannot be mixed with non-Registered modules.

Q: 4. Will this work with the MacPro5,1 that has one Quad-Core Intel Xeon 2.66 GHz processor ?

A: This kit should work with all Quad and Eight core Mac Pro 5,1's.

Q: 5. I have a RAM with error among 4x32GB. Can I replace just one?

A: They should be replaced in pairs.

Q: 6. Is this compatible with Mac Pro mid 2012 with 3 1066 2GB installed and one empty slot. I want to raise the RAM to 32GB. If this does not work what RAM do you reccomend?

A: This memory will not work in a Mac Pro. This is memory for an iMac or Macbook Pro. You need the OWC1333D3X9M032. However, this memory will require you to remove the existing Apple memory.

Q: 7. will these work in a Mac Pro mid-2012 5.1 6-core machine?

A: If your Mid 2012 Mac Pro shipped with 1333Hz RAM it will be fully compatible with the computer. Note that some Mid 2012 models shipped with 1066MHz RAM. You can verify which your system uses by opening the System Information application in the Utilities folder.

Q: 8. Is this RAM compatible with this specifications?- PC3-10600E, 1333 MHz, DDR3 SDRAM UDIMMs and RDIMMs- Error-correcting code (ECC)- 72-bit wide, 240-pin ECC modules- 36 ICs maximum per ECC UDIMMIt's a mid 2012 12 core MACPROThanks

A: I put mine into a 2010 MacPro and it works perfectly

Q: 9. Can I install this in my MacBook Pro Mid 2010?Processor: 2.4 GHz Intel Core 2 DuoMemory: 4 GB 1067 MHz DDR3Graphics: NVIDIA GeForce 320M 256 MB

A: This kit is for an iMac with 4 memory slots. I would need to know the computer's serial number to point you to the correct memory modules.

Q: 10. it fits in IMAC 11.1 later 2009 ddr 1333 ?

A: I bought for my Macbook Pro early 2011 model # 8.1. Going from 8gb to 16gb improved performance even more than I expected. I cannot vouch for compatibility for any other model of Macbook Pro.