ASRock BIOS won't let me increase long duration / short duration power limit

[sam.mccants1]

Hi guys, when trying to overclock my 8700k I saw that the clock speed was being throttled when running more than 5 threads in Prime95. Intel XTU showed that the cause of this is power limit throttling, and after some research I learned that what I need to do is increase Turbo Boost Short Power Max and Turbo Boost Power Max.

The problem is, my BIOS won't let me change these values by much. It only lets me set the short limit up to 150 and the long limit up to 130. Is there a way to override this? When I try to set it higher, it says "Invalid input, auto adjusted". I can make the changes in XTU, and it does fix the throttling, but then the settings are reverted after restarting.

I'm using an ASRock Z370M-ITX/ac motherboard by the way, and here's my complete build:
https://uk.pcpartpicker.com/list/LcpWmq

Temperatures are in the 50s when torture testing.

 

[Darkbreeze]

Do you have the latest bios version installed?

 

[sam.mccants1]

Thanks for your reply. Yes, I do. Since I posted here I was told this when I asked on another forum: "You need a mobo like the fatality to get your power limit to 200w.It is limited to 130 for 'safety' reasons."

Would you say that's accurate?

 

[Darkbreeze]

No, it is not accurate. Power limit on this board is 200w as explained here, along with a lot of other good information on that board.

https://www.overclock.net/forum/6-intel-motherboards/1682737-asrock-z370-90-owners-discussion-thread-asrock-z370-fatal1ty-gaming-itx-ac-review.html

 

[sam.mccants1]

Thanks for the info; I don't think that's my board though, that's the fatality board

 

[Darkbreeze]

You're right. My bad. I dunno why I got that result OR didn't realize it was a different model. Brain pause I guess. Sorry about that.

Much as I hate to admit it, I can't find anything relevant to those specs on your model of motherboard, but I'd bet that somebody on the Small form factor forums should be able to.

https://smallformfactor.net/

 

[sam.mccants1]

No worries man! Thanks for your help. It is a silly naming convention tbh, since almost my whole motherboard's name is included in the name of the other board.

I think I'll play it safe and just not push too far. I'm pretty new to overclocking, and I'm still nervous about messing stuff up, so for now I think I'll leave the clock at 5GHz, not mess with the voltage, and not worry about the power limit throttling.

Thanks for your help!

 

[Darkbreeze]

5Ghz is MASSIVE for an overclock on ANY generation or model of CPU. Not a speed that I'd recommend running as a daily driver unless you're using a pretty massive high end air cooler or a big AIO or custom loop water cooler.

Chances are VERY good that at that clock speed your configuration is highly unstable if using stock voltage or very hot if allowing the system to automatically control voltage based on the base clock configuration.

What have you used to test stability? This is what I'd recommend you do. Read the following tutorial I am currently working on. You can skip to the bottom for the fast version, but I'd highly recommend reading the entire tutorial.

http://www.tomshardware.com/faq/id-3761568/cpu-overclocking-guide-tutorial-beginners-work-progress.html