new windows patch killed my 6850k overclock

I knew this was a thing before with spectre and all that but it never affected my overclock until the update that installed yesterday. Instead of my all core 4.3ghz overclock, I'm boosting to a single core of 4ghz and all core 3.8ghz. Is this happening to anyone else, and why is it happening now when I thought the patch was supposed to be last year?

Bios update fixed the overclock problem. Still in the dark about why it took this long to show up