ASRock Z370 Extreme4 problem shutting down

My CPU clock will occasionally lock to a certain frequency, and when this happens my PC wont shut down anymore. This only seems to happen in CPU Ratio= Auto. Sometimes it happens after 5mins, sometimes 1 hour.

And as a coindidence ,if i set my CPU Ratio to Per Core or All Core (any Value), my PC will also not shut down from the get go. Maybe because the CPU Clock is also locked.

What happens is lights and fans stay on, only Monitors turn off. Pressing the power button long enough will power it down.

What also happens is that my PC will improperly restart in the same situation. It does turn off the whole system for ~1sec then turns it on again, sometimes 2 times. But this is less of a Probllem. Seems to be all the same Issue nonetheless.

It seems something is locked up internally.

The 8700Clock does normally vary from 800 to 4700mhz, all works, my PC shuts down and restarts fine and quick etc.

I tried BIOS 1.20 and newest 1.30.

With 8700K
seasonic x series 560 watt
2x8 GB ddr4 in A2 B2

Apparantly all my Problems are truely gone. Weird

VCCIO and VCCSA were also too high as this was the cause for rare memtest errors.

Yea just lower VCCST to 1.2 or some. This is how i solved it. And i also had the frequency lock. It was when my PC wouldnt power down, so i figure this is the same issue.

Often it would lock at my OC clock 4,9Ghz. But sometimes it locked lower or even 800Mhz

Hi everybody, I'm having the same problem on my brand new build with Extreme4 and 8700k . System performs brilliantly and stable, but occasionally (let's say 2 out of 5 times) when shutting down, Windows close correctly but fans and leds stay on and I have to long press power button on the case.
System is overclocked (4.8Ghz with fixed 1.155 volts), but the same happens with default clock.
I checked VCCST but it's already at 1.15.

How can I check the frequency locks? Any other suggestion?

Thanks!

badbri wrote: Sounds like a Windows issue. The BIOS and OS talk to each other and I bet you have a power saving setting that is not good when overclocking. Try changing your Windows Power Options to Balanced and see what happens. Also disabling C states in the BIOS might help.