I recently picked up a 2013 “trash can” Mac Pro. They are pretty cheap on eBay these days. I went with the dual D500 version, which came with the 6C/12T 1650v2. $30 later and I grabbed a 12c/24t 2697 v2 and performed the surgery to do the CPU upgrade. I must say, people made it sound way harder than it actually was. I think it took me maybe 30 minutes and I took an air duster to it while I was in there. I also added a 1TB NVME drive. It’s plenty fast for my photo editing, and I always wanted one of these. It was a $3000+ machine at one time, and I paid under $400 after upgrades.
For laughs, I booted to W10 on it and ran SOTR bench, even in Crossfire Pro, it was working hard to bring home 30fps at 1080p high. Oh well, it’s not intended to be my gaming machine anyway.