Okay, the title is clickbait but it is important for us to see the downsides of upgrading. I guess I am happy to show that, even though I would rather have not broken the iMac.... If you want the cpu is an intel xeon 2191-b Buy it on eBay. Original price of $5,000 + $2499 for the upgraded CPU (I have proof down below) In all seriousness, if you have any suggestions I am all ears, literally I have huge ears compared to my bald head now. Thanks as always for watching! Scott with Techno Eclipse https://web.archive.org/web/20180724034808/https://www.apple.com/shop/buy-mac/imac-pro?product=MQ2Y2LL/A&step=config