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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. Benutze die Anleitungen des iMac Intel 27" Retina 5K Display (Ende 2014 & 2015), da das Gerät sehr ähnlich ist.

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Upgrade CPU from 7700k to 9900k

Hello

It is possible to upgrade my iMac 2017 i7 7700k with the new 9900k 8 core ?

Beantwortet! View the answer Ich habe das gleiche Problem

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I'm curious to know if you went ahead and tried this…

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Gewählte Lösung

Romulus - While I commend you or your tenacity! You face a few road blocks that prevent you from doing this.

Apple limits the system BIOS (EFI) to the CPU’s of the systems series. So technically your system is limited to the CPU’s in this set of systems iMac18,3

While Apple has just introduced a new set of iMac’s iMac19,1 and Apple now offers an iMac with a 3.6 GHz Core i9 (I9-9900K) we don’t know what Apple did internally yet.

It might be a simple swap out of the CPU if Apple only updated the current EFI firmware with the chips ID, or it may require manually updating the EFI chip.

As far as the systems cooling I strongly recommend you don’t try de-liding the chip! Intel is now soldering the lids on to improve the thermals. All you’ll do is damage the chip ($$$) So don’t do it!!

Also don’t use liquid metal TIM!! The mounting of the CPU allows the TIM to slowly leak out and the heat sink will be damaged by it as well.

Why don’t you wait a bit until the IFIXIT (or other group) teardown team has has a chance to review the new system before jumping.

If you really need this level of performance now I would recommend you just buy the new system or get an iMac Pro which offers much better performance options with the Xenon CPU’s

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I’m not sure if Macs have restrictions in the BIOS that could restrict it.

The 2 processors use the same socket so it should work. The biggest problem I see you having is cooling the 9900. They get much hotter and I doubt you have any options on upgrading the cooling components in a mac.

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Thank you for the answer ! :)

I hope to fix the temperature whit a delid and thermal past with metal liquid, I hope is enough, thanks

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Hi romulus have you tried to replace i7 7700k with i9 9900k on imac 27 2017? It can work?

I ‘ll want to upgrade cpu to 9900k but I didn’t found any feedback

Thanks

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It's impossible to install 8th 9th gen Intel core on 7th gen motherboard, regardless of the motherboard brand, although they shares the same physical socket.

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Have you done it? What happened?

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romulus79 wird auf ewig dankbar sein.
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