Upgrade the memory in select 2009-2010 Mac Pro systems or compatible PCs/servers using the 32GB DDR3 1066 MHz UDIMM Memory Kit from OWC / Other World Computing. This memory kit features a total capacity of 32GB, which is made up of four 8GB modules. It features a clock speed of 1066 MHz, a bus speed of PC-8500, and a 240-pin UDIMM form factor. It operates using 1.5V, 7-7-7-20 timings, a component configuration of 1024M x 72, and a module bandwidth of 8.5 GB/s. 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 includes an Apple-Specified Thermal Sensor, which ensures that the RAM maintains a safe thermal operating range.

32GB (4 x 8GB) Capacity    1066 MHz Clock Speed    PC-8500    240-pin UDIMM    1.5V    7-7-7-20 Timings    ECC    Apple-Specified Thermal Sensor    Module Bandwidth: 8.5 GB/s    Compatible with the Select Mac Pros

Model ID: MacPro4,1

Quad-Core: 2.66 GHz, 2.93 GHz, 3.33 GHz

Eight-Core: 2.26 GHz, 2.66 GHz, 2.93 GHz

Model ID: MacPro5,1

Quad-Core: 2.8 GHz, 3.2 GHz, 3.33 GHz

Eight-Core: 2.4 GHz

Model ID: Xserve3,1

Quad-Core: 2.26 GHz

Eight-Core: 2.26 GHz, 2.66 GHz, 2.93 GHz

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

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

Related Questions and Answers

Q: 1. 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: 2. 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: 3. 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: 4. Is it compatible with 2009 Mac Pro?

A: This would not work, I would suggest this 4GB option, please see link: a href= http://bhpho.to/1xLB0tY target= _blank http://bhpho.to/1xLB0tY/a

Q: 5. 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: 6. will this work on HP Desktop ENVY 700-074 ?

A: The OWC 32GB DDR3 1600 MHz SO-DIMM Memory Upgrade Kit (4 x 8GB) will not work in an HP Desktop. The OWC RAM modules are listed as compatible only "...with the late-2015 27" iMac with Retina 5K display, the late-2014 27" iMac with 5K Retina display, and late-2013 and late-2012 27" iMac models." Also, they are not the correct form factor.

Q: 7. 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: 8. Do these have heat spreaders attached?

A: The RAM chips in this kit have heat sinks attached to them.

Q: 9. Are these actually UDIMM? OWC's website shows them as Registered (aka RDIMM)

A: These are RDIMM's.

Q: 10. Can I use those OWC in addition to my Mac Pros (12 core mid 2012) original Hynix modules?

A: I can tell you that those dimm work fine in your mac, but I don' t know if you can mix with others . In fact I had incompatibility problems with other dimm ( not The original).