Z790 Hero 13900KS not letting me run at default PL1&2

[USERMAC]

For some reason my Z790 Hero when I have everything at default with MultiCore Enhancement disabled my 13900KS is not sticking to it's default PL1 and PL2 Limit as it is setting both of the limits to 320.0W.

I can not get the chip to run at stock could this be a fault with the bios ? I am using Bios ver. 0813

Power Limits should 253W PL1 & PL2 not 320W

what is going on ?

[JohnAb]

Don't worry, those values are simply the maximum power limits permitted by the BIOS settings. My PL1 and PL2 limits are both 4,095W by default. The CPU will only draw the power that it needs, up to its self imposed-limit. Not sure why we both have different limits, different BIOS default values I imagine (I'm on 690), but I'm confident that you're all good 🙂

[xarot]

I was just about to post about the same topic. Since installing the 13900KS the power limit for PL1/PL2 is 320W at minimum even when Enforce All Limits settings is selected/MCE disabled. To my understanding, the 320W is called "Extreme Config" and should be disabled by default. Everywhere it is being mentioned that the all-core maximum power should be 253W not 320W. I am on Asus Z790 Extreme and 0813 BIOS. I can of course set PL1/PL2 manually but that's not the point of Enforce All Limits setting is it?

320W is already quite uncoolable on test bench with a thick EK XE 360 radiator, EK DDC pump and EK waterblock with contact frame, temps creeping up to 97c on cores without touching other settings and looping CB23.

[USERMAC]

When you choose to disable multicore enhancement it should be Enforcing all limits.

The stock limits are being ignored with Bios 0813

I understand the board is capable of going past its stock limits that is obvious that is why we buy this type of hardware but before I do an overclock first I need to see how the cpu performs and Stock but I can not as the board is not enforcing the stock limits this is wrong.

I watched this overclock guide by youtuber SkatterBencher and with his Z790 Hero and 13900KS it is able to enforce all the limits but he is on a Bios that is not available on the Z790 Hero's support page.

This is the link to the video If you don't mind taking a look just beginning 3 mins mark

https://www.youtube.com/watch?v=dpWw_5KfpIw&t=249s

His Hero is enforcing the limits on the 13900KS but he is on a different Bios that is not available

The current Bios 0813 does not enforce.

[xarot]

I can set Disable - Enforce All Limits setting in ASUS MultiCore Enhancement, reboot, check "Current ASUS Multicore Enhancement Status" setting and it shows as disabled. Then I go to Internal CPU Power Management, there the Long and Short Duration Power Limit settings are set to 320W, not 253. Is this different how yours works?

I will grab some screenshots once I have more time.

[USERMAC]

Its a bad Bios 100%

So basically if you clear CMOS and then set enforce all the limits go into the CPU power management you can see it shows the correct power setting of 253W I have taken a photo see below links. Now as soon as you save and exit and go back into the bios go into CPU Management again you will see the power limits have changed to 320W I have taken photo.

So the enforce all limits is Broken on BIOS 0813

link to photos in order
https://imgur.com/a/2OnX6MC
https://imgur.com/a/hI1bngd
https://imgur.com/a/Jh82vus

[xarot]

Here are my photos as well. Hope uploading them works.

1. All stock



2. All stock - PL1 & PL2 limits



3. Disable MCE, use Enforce All Limits Settings and reboot



4. After reboot setting is active and MCE is disabled as expected



5. But the power limits are still at 320W.



6. Running CB23 with these settings, power hits 319W if its a correct reading and CPU is a volcano.

[xarot]

It looks like the PL1 & PL2 with the AUTO setting are different even if we are on the same BIOS but you have the Hero and I have Extreme board if we compare the screenshots. But still, looks like when enforcing all limits, for both the PL1/PL2 are set to 320W.

I wonder if there is some setting they forgot to disable with the enforce all limits settings as it doesn't otherwise make much sense. With AUTO settings I am hitting ~335W max and ~319 on enforce all limits. Or maybe this Extreme Config by Intel should be controlled in the BIOS as a switch, I don't know. This indeed looks like an oversight or a bug. Is there some channel to report BIOS bugs? Last time I contacted local Asus support and they were so clueless I don't want to bother with them again.

[iBruceypoo]

MCE disabled enforce all limits with Z790 Apex bios 0812 - PL1 and PL2 reading 320watts with my 13900KS.

[USERMAC]

The default specification for Turbo Boost 2.0 is PL1=PL2. For the 13900KS it should be 253W if you are enforcing all limits however I think Intel have an Extreme specification mode that is not well documented and that is PL1=PL2=320W. So it looks like the bios when you set it to enforce all limits it is just setting it to Intel's own stock "Extreme Power Delivery Profile" If this is correct then we are missing the original power limits for the enforce all limits for Intel stock enforce all 253W power limit and it has done away with it and just replaced it to the extreme mode.This is not to be confused with Asus's own Multi Core enhancement this is Intel's own recommended Extreme mode power specification.
I think stock enforce all limits should not be replaced with an extreme profile 320w this should be separated again not to be confused with Multi core Enhancement.
Can an Asus admin look into this and say if this is the case?

Extreme Power Delivery Profile13900ks now = 320W instead of 253W