Hello,

 

I thought that "balanced operation" was enabled for AMD processors.

However it seems to be unavailable on my new AMD 9700x build 

 

 

Thank you

Edited August 15, 20241 yr by Boes

6 hours ago, Boes said:

I thought that "balanced operation" was enabled for AMD processors.

It is for older AMD CPUs, I have a 2nd gen EPYC and it's an option, it's not for newer AMD and Intel CPUs, too new for the kernel.

On 8/15/2024 at 11:46 AM, JorgeB said:

It is for older AMD CPUs, I have a 2nd gen EPYC and it's an option, it's not for newer AMD and Intel CPUs, too new for the kernel.

I have Ryzen 3900. I believe "Balanced" was available earlier but now it's not

My system has Ryzen 5900x.

Updated from 7.0.1 to 7.1.3, and the Balanced operation became unavailable, which was available before.

Looking into "tips and tweaks" plug-in, there seems to be two new power modes option: Balanced Performance & Balanced Power

However, none of the setting seems to be limiting the power usage. Before the update, best power efficiency mode will limit the cpu turbo, but not anymore with 7.1.3

This is due to the kernels newer cpu driver you can append the older one to get the old options back. I just can’t remember off the top of my head what it is.

12 hours ago, jfoxwoosh said:

Before the update, best power efficiency mode will limit the cpu turbo, but not anymore with 7.1.3

Kernel in 7.1 uses the newer amd-psate driver, which is supposedly better, but if you prefer the old one, you can disable it in sysslinux.cfg, then reboot

Thank you all for the replies. p-state is keyword I needed for further googling and learning.

I found these from reddit and phoronix very helpful.

After some experimenting and changing the setting, 7.1.x power modes will corresponds to the following:

(note1: by default for AMD Ryzen 5900x platform without modification to syslinux.cfg)

(note2: I kept the same nomenclature as the phoronix article)

Best power efficiency -> amd_pstate_epp powersave performance

Best performance -> amd_pstate_epp performance performance

Not sure if it is bug or by-design, the Tips & Tweaks plugin cannot change the Energy Performance Preference to anything other than "performance".

To change that, I have to use the command found in the reddit post.

echo "balance_performance" | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/energy_performance_preference

I have since changed the preference to "balance performance" (making it amd_pstate_epp powersave balance_performance) and am quite happy with the result.

Edited June 19, 20251 yr by jfoxwoosh