iMac 2015 logic board upgradable to 2017?


macrumors newbie
Original poster
Oct 7, 2019
Hi, I have an iMac retina 2015 27" M395X with a defective logic board, but the screen works perfect.
As I have seen on ifixit and with comparing photos of the boards of the 2015 and 2017 imac retina versions they seem really the same.

So now I am wondering if it is possible to upgrade my 2015 imac with a 2017 (maybe R570) board?
Are the displays the same so the old panel will work with the new board?
Maybe an issue could be a different power supply so I have to change this as well beside the CPU/Memory which needs to be upgraded.

Does anyone have experience or deeper knowledge of this?


macrumors member
May 19, 2019
The only difference between the 2015 and 2017 that I can think of is that the 2017 has moved the location of the internal microphone - this could also mean that a couple of the pins on the camera connector could be in different places for these two years.
PSU should be the same with these models -- the only issues you would have is the internal microphone, and possibly your camera.


macrumors regular
Sep 1, 2010
I believe the 2017 has USB-C/Thunderbolt 3 ports while the 2015 has Mini DisplayPort/Thunderbolt 2. Could perhaps be an issue with the holes for the ports?


macrumors newbie
Original poster
Oct 7, 2019
Yes the 2017 IMac has got tb3. This is one of the reasons why I want to upgrade. But I think with a dremel this problem can easily be solved. Not beautiful but suitable.
The the camera and mic would be more an issue. I dont really need them, though I think the apple Hardware test would fail if I dont plug them in? Is the problem with the fans on maximum speed still existent if they are not plugged in? On the other hand, regarding the ifixit guide, I could easily change them too.


macrumors P6
Feb 20, 2009
They're not interchangeable.

If you want "more", time to look for a 2017 or a 2019, new or Apple-refurbished.


macrumors member
Oct 21, 2010
As far as I know, the display connector is located in a different place, the camera connector and microphone as well. Since the display is using eDP, I guess it should be possible to make it work. Not at all sure about the backlight pin out though, watch out and measure voltages. Tb3 port arrangement will lead to a dremel situation.

Perhaps it’s better to buy a full 27” 2017 for 1000USD instead of a 2017 logic board for 500USD, unfortunately


macrumors 68040
Dec 30, 2009
check ebay for a dead or gutted 2017 imac.

You just need the case.

I would check ifixit to see if the monitor connections are the same, that would definitely be a deal breaker.

Just open a tear-down of both machines up side by side and see what is the same and what is different.