Question i5 13600k P-Cores not boosting beyond 2.5 Ghz

[Rocky000]

Hi, I am running an i5 13600k on the latest Bios version on a ASRock B760 Pro RS Wifi.
I tried stress testing the CPU with Prime95 and Cinebench R23 and my CPU, but the P-Cores (according to HWInfo64) do not clock beyond 2.5 Ghz, while the E-Cores do their stock 3.9 Ghz. (Cinebench R23 multi score is roughly 15.000).
My first idea was to check the multiplier, but that one is set to 51 / stock already. Tried adjusting PL1 and PL2 to 181W, but even then the P-Cores do not want to clock beyond 2.5 Ghz. The CPU is also only drawing up to roughly 110W during those stress tests.
HWInf64 does not give me any throttling issues.

What could be the issue?

 

[MCH170]

Unlikely but what about Windows power plan set to power saver?

 

[Rocky000]

I literally just figured it out the moment I got your notification.
Yes, your guess is correct.
I checked the windows 11 power settings and they were all turned off, so max performance. That´s what I checked a couple of hours ago already.... but for some reason, that old power plan page from like windows 7 was set to energy save mode, while the windows 11 settings have show no sign of that.... thanks windows for wasting me a couple of hours.

P-Cores are now hitting their supposed stock clock speeds temporarily, before power limit is triggered.
r23 cinebench score of 19.500 now at 150W.

I hope this will help someone in the future! Thanks mate!

 

[MCH170]

Thanks mate!

You're most welcome!

 

[uWebb429]

r23 Cinebench score of 19.500 now at 150W

A well tuned 13600K on a B760 motherboard can score a hair over 24,000 in Cinebench R23. If you are interested in more performance, there is still lots of room for improvement. Here is some more info about the issues you can run into when trying to maximize performance. Using the early microcode version 0x104 will unlock CPU voltage control. Undervolting will allow full CPU speed without excessive power consumption or heat.

https://www.techpowerup.com/forums/...play-is-locked-and-cannot-be-operated.304802/

ThrottleStop 9.6 Download

ThrottleStop is a small application designed to monitor for and correct the three main types of CPU throttling that are being used on many lapto

www.techpowerup.com

 

[Rocky000]

A well tuned 13600K on a B760 motherboard can score a hair over 24,000 in Cinebench R23. If you are interested in more performance, there is still lots of room for improvement. Here is some more info about the issues you can run into when trying to maximize performance. Using the early microcode version 0x104 will unlock CPU voltage control. Undervolting will allow full CPU speed without excessive power consumption or heat.

https://www.techpowerup.com/forums/...play-is-locked-and-cannot-be-operated.304802/

ThrottleStop 9.6 Download

ThrottleStop is a small application designed to monitor for and correct the three main types of CPU throttling that are being used on many lapto

www.techpowerup.com

I tried undervolting the last couple of days. Main reason was that a friend of mine with the i9 13900k only had like 10-15W in idle, while my 13600k was idling at 40W (CoreVIDs always were at 1.38V) and with power being costly of more than 0.40€/kWh, I had to do something. What solved that idle draw was just updating the bios to the latest version. I still had one from 09/2023 when I build the system. The score I mentioned is performed on 1.22V fixed (fixed because ASRock only allows the offset to be up to minus 100mv) + Load Line Calibration of 5 (5 is maximum voltage droop on ASRock, it´s the other way around on other manufactures from what I´ve read).

I assume those settings might be the reason why, during CInebench R23, the P-Cores now boost around 4.7 Ghz and E-Cores to 3.7 Ghz and thus the score is at it is. The voltage under the 150W load goes to 1.24V.

I´ll take a look at that thread. My main concern with the early microcode version though is longevity of the CPU and also maintaining that low idle draw.