This confuses me. I've never had my CPU downclock to the 800MHz minimum, so maybe I'm the one who needs help because I still can't figure out how or why I get high clock speeds at low power states (not that I mind the bonus speed, I just can't work it out). Anyway, the advice most everyone seems to agree on is disabling Multicore enhancements, because it can aggressively keep the cores (over)volted. If you can share other BIOS settings, maybe someone who has a similar-functioning 9700K can help you. If it's an ASUS board, there were some new BIOS released yesterday,e.g 0805 for my ASUS Prime Z390-A, so he could try that.