I am in need of any standard Epyc CPU to perform a BIOS downgrade on the Supermicro H11DSi mainboards I have. I am doing this to test and see which (if any) BIOS will allow any of my 5 Epyc ES CPU samples to work in these boards. I would be willing to pay for the borrowing the CPU. I shouldn't need more than a week to walk through all the combinations I'd like to try. Of course, it may only take a day if the oldest BIOS also doesn't work.