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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So i tried this yesterday and can say NO IT DOES NOT WORK- sadly.
Tried to install a i9 11900k in a 27" 2020 with i5 10500.
I had hope it does work after you can install a i9 9900 3,1 in a iMac 21,5 2019 but the fastest possible CPU in the 2020 model is the i9 10900k
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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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