Upgrade the memory in your 27" iMac with Retina 5K Display (Late 2015) with a model ID of iMac17,1 using the OWC 4GB DDR3 1867MHz SO-DIMM for Late 2015 iMac 5Kfrom OWC / Other World Computing. This single memory module features a capacity of 4GB, a clock speed of 1867 MHz, a bus speed of PC3-14900, and a 204-pin SO-DIMM form factor. It operates using 1.35V, has a CAS Latency of CL=11, a cycle time of 1.875 ns, does not support ECC technology, and is not registered. Additionally, it is fully compliant with JEDEC specifications and is RoHS certified.

Please bear in mind that this RAM will only work with the Apple 27" iMac with Retina 5K Display (Late 2015). These systems have a model ID of iMac17,1.

4GB (1 x 4GB) Capacity    1867 MHz Clock Speed    PC3-14900    204-pin SO-DIMM    1.35V    CAS Latency CL=11    Non-ECC    Unregistered    iMac Retina 5K (Late 2015) Compatible

Compatible with the Apple 27" iMac with Retina 5K Display (Late 2015, Model ID: iMac17,1)

Low Noise 8-Layer PCB

Meets and/or exceeds Apple/Intel specifications

Fully compliant with JEDEC specifications

RoHS Certified

Related Questions and Answers

Q: 1. I have 8 gigs RAM stock (4 *2). Can I add one 8 gig to make 16 or do I need to replace the 4s with 2 8s to make,16?

A: Either go with two more 4's to make 16 or 2 8's (leave the 2 4's you have in) for a total of 24. This ram needs to be installed in pairs.

Q: 2. My 27" late 2015 Mac OS has room for two 8GB memory modules. Cheaper to buy one 16GB. Can I use one 16GB instead of 2 8GB?

A: Yes you can. The system works best when its in pairs, so if you plan on adding another card it should be a 16GB not a smaller or larger size.

Q: 3. I can use late 2015 4k imac

A: yes

Q: 4. I have 2X4gb ram in my iMac 5K, would this work with two 8gb in the remaining two slots?

A: Yes, you can populate the two empty slots with these and keep the Apple memory installed.

Q: 5. Is it compatible with iMac 5K which has been manufactured in 2016?

A: I purchased this memory from my new Apple 27 iMac with Retina 5K Display (Late 2015) and it works perfectly. This is the correct spec for the Retina 5K Mac.

Q: 6. 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: 7. Does it work with the Motherboard Intel DP67BA ? I will be waiting your good answer

A: The Intel DP67BA motherboard only accepts DIMM type DDR3 chips. The OWC 16GB DDR3 1333 MHz Memory chip is an SO-DIMM type chip and will not fit on the DP67BA.

Q: 8. I'd like to use these in a late 2012 mac mini (6,1). Will they work?

A: Yes, the OWC 16GB DDR3 1333 MHz SODIMM Memory Kit (2 x 8GB, Mac) would be compatible with the Mac mini (6,1).

Q: 9. Hello, Is this compatible with the i7 operating system? or just i5? Thanks!

A: Been blazing away in my i7 2015 model iMac for months now. I actually installed four of the 16GB cards to end up with 64GB (which the system is capable of handling right out of the box) of speedy RAM. If you go with these cards, you'll be pleased.

Q: 10. 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