How do I undervolt?

[fUnDaMeNtAl_knobhead]

I have a Asus G14 as you might have guessed and also with it's small form factor many have reported hot temperatures however I still want great performance. I found a tool called amdctl however I don't know how to use it there aren't any comprehensive guides also if possible I want to under volt the gpu though there are conflicting sources about the ability to do so.

 

 

BTW I am using Manjaro Linux

[Master Disaster]

Don't undervolt, its unnecessary. Use the kernels built in governor.

 

https://wiki.archlinux.org/title/CPU_frequency_scaling

 

Personally I use cpupower and it has a really nice GUI tool in the AUR - https://aur.archlinux.org/packages/cpupower-gui/  though I would recommend setting your required scheme as a kernel parameter over using software.

 

AFAIK you can't undervolt a GPU under linux easily. I'm sure it can be done but there's no nice tool to do it (I don't think).

[fUnDaMeNtAl_knobhead]

44 minutes ago, Master Disaster said:

Don't undervolt, its unnecessary. Use the kernels built in governor.

 

https://wiki.archlinux.org/title/CPU_frequency_scaling

 

Personally I use cpupower and it has a really nice GUI tool in the AUR - https://aur.archlinux.org/packages/cpupower-gui/  though I would recommend setting your required scheme as a kernel parameter over using software.

 

AFAIK you can't undervolt a GPU under linux easily. I'm sure it can be done but there's no nice tool to do it (I don't think).

But if you use undervolting you an get more performance right??

[incepted]

Undervolting wouldn't get you more performance in most cases, it may decrease your power usage but to increase performance, you should overclock.

[WereCat]

52 minutes ago, linux fanboy said:

But if you use undervolting you an get more performance right??

Yes but just very slightly so  you need to combine it with overclocking if you want to squeeze out more performance. 

 

Undervolting helps you to cut down your power consumption at given clock speed at the cost of stability. 

 

Overclocking is increasing the clock speed at given voltage. 

 

Both of these combined will give the benefits of both but you can't really push it one or other direction too much otherwise the instability will kick in immediately. Its about finding the sweet spot. 

[meidi]

On 12/20/2021 at 11:10 AM, linux fanboy said:

But if you use undervolting you an get more performance right??

If your GPU is thermal throttling, undervolting may allow you avoid it. In this case, you'll notice an increase of performance.

 

However, thermal throttling occurs under heavy work loads (or even light/medium work loads if the cooling system is bad) so unless you're using heavy application there won't be any improvement.

 

Anyway undervolting decrease power usage, slightly extending the battery duration.