do you have a bios that supports the cpu installed on that thing by MSI please?
and do you have cool and quiet turned on in bios?
it stays at 3200mhz on mine if you disable it and that does not affect the fact the cpu is an unstable lump of junk.
from my experience, I wont buy MSI or AMD again, sad overpriced rubbish.
Yes, definitely not AMD's problem--I can't even hear my fan at its max...;) All in all, it's a great idea to learn about how Windows power options work--and to learn about how the cpu you just bought works, too. Here are a couple of links to get you started on the road to knowledge:
BTW, Bing/Google is your friend. Basically, Cool 'n Quiet works exactly the way it did on your Intel rig. The above tutorial explains the Win10 power options settings and how they affect the operation of your cpu--a must read, no matter who makes your cpu. Good luck--you have much to learn...;)