Question 7800x 3d PBO settings in game ghz down help

[denizdedibi]

Hello, I adjusted the PBO settings. During the OCCT test at -30, the system was restarting. So I set it to -25 and it lasted for 2 hours without any problems. However, according to the PBO auto settings, the GHz drops in the negative curve I manually created. What is the reason for this? In auto, they run at least at 4.7? However, there are those that fall to 3.9 in manual settings. The strange part is that there is no such problem in Cinebench. It holds at 4.8 GHz and falls to 4.5 in auto settings. That is useful in the test but I don't understand why there is a GHz drop in the game. Same game, same area, pictures.

https://imgur.com/PVjGIia

View: https://imgur.com/PVjGIia
Auto settings

https://imgur.com/YZMrTVd

View: https://imgur.com/YZMrTVd
-25 CURVE
System :
7800x3d cpu
Msi b650 tomahawk wifi
2x16 gb lexar 32 gb ram 6000 mhz
750w msi gold psu
9070XT Saphire

 

[CountMike]

Hello, I adjusted the PBO settings. During the OCCT test at -30, the system was restarting. So I set it to -25 and it lasted for 2 hours without any problems. However, according to the PBO auto settings, the GHz drops in the negative curve I manually created. What is the reason for this? In auto, they run at least at 4.7? However, there are those that fall to 3.9 in manual settings. The strange part is that there is no such problem in Cinebench. It holds at 4.8 GHz and falls to 4.5 in auto settings. That is useful in the test but I don't understand why there is a GHz drop in the game. Same game, same area, pictures.

https://imgur.com/PVjGIia

View: https://imgur.com/PVjGIia
Auto settings

https://imgur.com/YZMrTVd

View: https://imgur.com/YZMrTVd
-25 CURVE
System :
7800x3d cpu
Msi b650 tomahawk wifi
2x16 gb lexar 32 gb ram 6000 mhz
750w msi gold psu
9070XT Saphire

Not all cores are equal, some may need higher voltage than others. Setting CO curve per all cores or per CCD, it adjusts voltage to all cores indiscriminately, You have to adjust CO per core and lower CO for slower ones.

 

[denizdedibi]

Not all cores are equal, some may need higher voltage than others. Setting CO curve per all cores or per CCD, it adjusts voltage to all cores indiscriminately, You have to adjust CO per core and lower CO for slower ones.

Hello, even if I start from -5, the ghz drops. When I switch PBO from auto to curve optimizer, the ghz does not stay stable at all, but in these games, they are boosted up to 4.8 in Cinebench.

 

[Roland Of Gilead]

CB will put a load on all the cores. So you're max all-core being 4.9ghz.

A game may not use all 8c/16 threads so the usage may differ. And not all cores may boost or are even needed to boost.

 

[denizdedibi]

CB will put a load on all the cores. So you're max all-core being 4.9ghz.

A game may not use all 8c/16 threads so the usage may differ. And not all cores may boost or are even needed to boost.

First of all, thanks for the answer. Now I noticed something. The same game can stay at 4.8 on 8 cores at the same point up to -20, but it drops to 3.9 at -25. What is the reason for this? There is no crash in OCCT or any other software. If it is due to load as you said, why is the auto locked to 4.8 in the same place on an empty map, but drops to 3.9 at -25?

 

[CountMike]

The same game can stay at 4.8 on 8 cores at the same point up to -20, but it drops to 3.9 at -25.

At -25, not enough energy (low voltage) to run at higher frequency.
Negative CO is most useful for temperature control, if you can cool it well enough under Tjmax for particular CPU, you don't need to force too low voltage.
If core voltage is too low power delivery goes up and may run into built in limits which throttles frequency.