Upgrade the memory in select 2009-2010 Mac Pro systems or compatible PCs using the OWC 16GB DDR3 1066MHz UDIMM Memory Kit for Macfrom OWC / Other World Computing. This memory kit features a total capacity of 16GB, which is made up of two 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 is compatible with Apple Specified Thermal Sensor, which ensures that the RAM maintains a safe thermal operating range.

16GB (2 x 8GB) Capacity    1066 MHz Clock Speed    PC-8500    240-pin UDIMM    1.5V    7-7-7-20 Timings    ECC    Apple Thermal Sensor Compatible    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

Related Questions and Answers

Q: 1. Will it support Asus ROG Strix Z590-A Gaming WiFi II IntelZ590 LGA 1200 ATX motherboard ??

A: Yes, the ASUS Strix Z590-A GAMING WIFI is compatible with this Crucial 32GB Desktop DDR4 3200 MHz UDIMM Memory Kit.

Q: 2. Will this work on the 5K iMac 2017?

A: No this would not, I would suggest the following https://bhpho.to/31rt48z for the iMac 27" (5K) 2017 model

Q: 3. There seems to be some doubt whether or not the 64GB (4 X 16 GB) would be readable by a iMac 5K 27 Late '13 model, but upgraded to current operating standards. From what I've read so far, it looks like it will only read up to 32GB of memory. Will it see all 64 or just utilize the 32GB that it says it can be upgraded to? Much confusion here! Don't want to make a $829 mistake here...

A: I'm sorry, but the 2013 iMac tops out at 32GB's of RAM.

Q: 4. 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: 5. is this compatible with the newest Intel i9 3.6GHz iMac 27" (2019)?

A: This ram is not compatible with the latest iMac (Early 2019) model. The compatible ram will be BH #OW2666D4S32P.

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-2010 - 2 x 2,4 GHz Quad-Core Intel Xeon ?

A: Hi, is that workin with macPro 5.1 ?

Q: 8. Hi, can this memory work in a Acer Aspire 5740-5749? (windows).The specification say memory for mac..

A: We specifically build our memory for Mac's, but most of the time it does work on PC's. The memory complies with JEDEC specifications, but there are far too many variables involved to tell you for certain.

Q: 9. dose it work with the hp 2000-2d19wn?

A: No, it is not the correct memory, it is too slow.

Q: 10. Does this work for a mid 2011 27 iMac 3.1Ghz Intel Core i5?

A: No, this should be the correct memory for a 27 Mid-2011 (iMac 12,2).a href= https://www.bhphotovideo.com/c/product/1212947-REG/owc_other_world_computing_owc1333ddr3s32s_32gb_4_x_8gb.html target= _blank https://www.bhphotovideo.com/c/product/1212947-REG/owc_other_world_computing_owc1333ddr3s32s_32gb_4_x_8gb.html/a