Katherine the Sixth on X: "Here's an AMD K5. Notable for being the first AMD x86-compatible they designed from the ground up. Also originated the fucking PR system - it's a “PR166”
1X AMD-K5 PR 133 GOLD VINTAGE CERAMIC CPU FOR GOLD SCRAP RECOVERY 03 | eBay
AMD K5 @ 112 MHz - CPU-Z VALIDATOR
CPU 486 and AMD-K5 plus some old PC boards | AmiBay
Microprocessor History - AMD K5, Red Team's First in-house Architecture