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Model A1419 / EMC 3070 / Mid 2017 / 3.4, 3.5 or 3.8 GHz Core i5 or 4.2 GHz Core i7 Kaby Lake Processor (ID iMac18,3) / Retina 5K display. Refer to the older iMac Intel 27" Retina 5K Display (Late 2014 & 2015) guides as the system is very similar.

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iMac 5k 2017 CPU upgrade to i7-8700k with the latest OS or Mojave?

Will the iMac 27" Mid 2017 support the new i7-8700k or better yet the i7-8086k processor? I want to upgrade to the best CPU it can handle but im still trying to get a grasp on Skylake vs. Kabylake vs. Coffeelake chipsets

Thanks !

-Zach

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You are limited to the CPU’s Apple has used in their systems. The Systems EFI (BIOS) limits you as well as the TDP of the chip.

So here is the 2017 iMac models: iMac18,3

The best CPU Apple offered is a i7-7700K which has a TDP of 91W and uses a FCLGA1151 socket.

The two CPU’s you were looking at here:

Both have a TDP of 95W and also uses a FCLGA1151 socket. Again, Apple’s EFI won’t support either and the TDP is a bit high from what Apple has used.

If we look at one of the Xeon W-2145 CPU’s the iMac Pro uses we can see the TDP is 140W so I’m suspecting the newer cooling system and power supplies is a requirement for these higher TDP CPU’s in this frame.

My guess is Apple will be intro’ing newer systems in the fall which might include newer iMac’s which are using the more powerful CPU’s and I bet you they will likely use the newer cooling design the iMac Pro. We’ll need to wait and see.

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Coffee Lake will never run on 2017 models. These Macs has a Z170 chipset and Coffee needs Z370.

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That is so disappointing. I thought I’d be able to swap in a 6-core into my 2017 5k

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you can, I swear the Moderators here work for apple....

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Is there any Xeon cpu that can be installed on that Imac 21.5 4k 2017 model that is kinda similar to the i7700 or i7700k?

I think Xeon CPUs are being sold for a lesser price than the i7. Trying to upgrade and save some bucks.

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The truth is that everyone is based on theory but nobody tries ...

I am convinced that it can work with i9 9900K because Catalina has instructions for Imac Pro

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