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A2115 / 2020 / Processors from 3.1 GHz 6-core i5, up to 3.8 GHz 8-core i7. Released August 4, 2020.

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Is it possible to upgrade to i9-11900K?

i9 11900K includes Intel® UHD Graphics 750. i9 10910 includes Intel® UHD Graphics 630 to allow startup screen.

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First of all the intergraded graphics level is not the biggest issue here. The CPU’s micro-code held in the systems EFI (BIOS) is!

Apple tends to limit the micro-code to the chips the given series use so that limits you to your options iMac20,2 that in turn limits you to Comet Lake CPU’s.

I don’t see enough CPU performance gains here to warrant effort. Consider the risks and the costs in trying.

I would put my money into adding RAM if you are still at 16GB and are running heavy processing tasks like large object images, video rendering or composing music. I would just up to 64 GB or if you have very large work sets maybe 128 GB. Just keep in mind you can go to big if you are not doing 80% large stuff all of the time. As an example I have a 2013 Mac Pro which has 128 GB and a 2 TB SSD which holds the OS and the apps I use for my photography. I use a 27” iMac for almost everything else and a 2012 15” MacBook Pro for my web postings here. So as you can see I use the best tool for the tasks, keep that in mind on what you are doing.

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