yeah mine was the same with the asrock killer x370 on the 1.6 and 1.63 beta, but when i switched to 2.0 and they changed up the voltage and manual OC part it forced it to run full speed all the time. I do like to be able to downclock when idleOn 1.60 (which is what I'm on currently since my RAM was already stable @ 3200CL14) If I set to Balanced power setting in Windows with a manual OC I get downclocks to ~2.2ghz when cores aren't active. I will double check on 2.00 BIOS.