Is it possible to fit a modern hardware Hackintosh in a 21,5" case?

I have an old 2011 21,5" iMac so I wondered if it is possible to equip it with new Hardware and turn it into a Hackintosh Build. My focus is less on GPU improvement but on a better CPU and DDR4 RAM. Has anyone here already tried a build that is comparable?

submitted by /u/Lol3droflxp
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