The Kingston REV to 486 386DX3+ is a vintage CPU/Processor upgrade specifically designed for IBM mod 80 computers. As a vintage part, it offers compatibility with older systems and provides a performance upgrade for those looking to enhance their computing capabilities. This was a purchase I made years ago to upgrade my model 8580 but never got around to it. It's never been tested and has been sitting in a box for 20+ years. With that said, I can't be certain that it works or doesn't work and am selling this as a collectable CPU.
eBay