Model A1419 / EMC 2806 & EMC 2834/ Late 2014 or Early 2015 or late 2015 / 3.3 or 3.5 GHz Core i5 or 4.0 GHz Core i7 Processor / Retina 5K display

170 Questions View all

Upgrading Processor on Late 2015 iMac 27

Late 2015 iMac 27 Retina 5k

I have two iMac 27's. One has an an Intel Core i7 processor.

The other one has an Intel Core i5 processor.

The speed difference is noticeable, so I'd like to upgrade the i5 to an i7 processor. Can someone please give me the i7 processor model number?

Can it be swapped plug & play, with no other concerns?

Answered! View the answer I have this problem too

Is this a good question?

Score 1


Thanks. I already scanned that process. It's the easy part.

That didn't address my original question.

Can someone please give me the i7 processor model number?

Can it be swapped plug & play, with no other concerns?


Add a comment

2 Answers

Chosen Solution

Here's the guide for doing it: iMac Intel 27" Retina 5K Display CPU Replacement


The iMac "Core i7" 4.0 27-Inch Aluminum (Retina 5K, Late 2015/Skylake) features a 14-nm "Skylake" Quad Core 4.0 GHz Intel "Core i7" processor (6700K) with four independent processor "cores" on a single chip, an 8 MB shared level 3 cache, 8 GB of 1867 MHz LPDDR3 SDRAM (PC3-14900) installed in pairs (two 4 GB modules)

4.0 GHz Core i7 (I7-6700K)

Was this answer helpful?

Score 4


I am wondering if someone has tried upgrading this model to 7700k (kaby lake). Since the socket connection is the same. I don't see a reason why it wouldn't work (apart from EFI or some other safety checks).


Its more than the socket its also the PCH needs to support it and the systems firmware as you noted needs to handle it.

I'm not sure if given the amount of work and the risks in replacing the chip are worth it given the slight speed bump you would get.


Would this clear this question?

SnazzyLab dit it in this video.


taogde Nice video! I invited him to join us.


Add a comment


I have just upload a video in Youtube for the imac 27" Late 2015 CPU Update.

I try both i7-7700K and the i7-6700K.

I have desassembly ans asasseble the iMac 7 times! :)

The i7-7700K will NOT WORK!!!

The i7-6700K WORKS Fine!!! Very smooth...

Operation Temps: 40-55 idle, and 85-99 (Rendering).

Very happy for updating the CPU ( I had the i5-5600 3.2Ghz)

Was this answer helpful?

Score 3


Thank you for your info. You saved me a lot of time.


You are welcome!


Hey i have the same problem i also buy i7 7700k and it doesn't work with my late 2015 27 iMac. and i also deassembly and assemble it 8 times as well :D

So now i need to buy 6700 or 6700 k ?


I used the i7-6700K, and it works fine! the i7-7700k will NOT work....


I also have the same imac, and I plan to migrate from core i5 to i7. Thanks for the help!


Show 3 more comments

Add a comment

Add your answer

clearw will be eternally grateful.
View Statistics:

Past 24 Hours: 27

Past 7 Days: 104

Past 30 Days: 491

All Time: 4,493