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Intel-undervolt: CPU undervolting and throttling configuration tool for Linux

(github.com)
132 points cl3misch | 6 comments | 17 Jun 24 22:44 UTC | HN request time: 0.617s | source | bottom
1. jauntywundrkind ◴[18 Jun 24 00:29 UTC] No.40712804[source]▶
It was sad seeing AMDGPU limit undervolting semi-recently. A couple complaints or bits of damage ruined a practice that a lot of people were using just fine to save significsnt wattage, https://www.phoronix.com/news/AMDGPU-Lower-Power-Limit
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2. fbdab103 ◴[18 Jun 24 02:04 UTC] No.40713386[source]▶
Super frustrating. From the mailing thread:

  However, this is not good as it remove under-powering range too far. I was getting only about 7% less performance but 90W(!) less consumption when set to my 115W before. Also I wonder if we as a OS of options and freedom have to stick to such very high reference for min values without ability to override them through some sys ctrls. Commit was done by amd guy and I wonder if because of maybe this post that I made few months ago(business strategy?)
I have certainly crossed a threshold where hardware seems good enough. I do not need the 99th percentile performance if it comes with a non-linear increase in power consumption.
replies(1): >>40714669 #
3. Rinzler89 ◴[18 Jun 24 06:31 UTC] No.40714669[source]▶
>I have certainly crossed a threshold where hardware seems good enough. I do not need the 99th percentile performance if it comes with a non-linear increase in power consumption.

But this is how AMD, Intel and Nvidia have been pushing performance improvements to consumers every generation. To quote Darth Sidious: "UNLIMITED POWER!"

4. nottorp ◴[18 Jun 24 06:54 UTC] No.40714814[source]▶
Not just AMD. I recently bought a nvidia 4060 card and i can't set the power limit lower than something like 75-90 W, at least in Linux.

Of course, it's possible that the lower limit has always been there for nvidia, but I just didn't know because I went without a dedicated video card for like 4 years.

For AMD aren't the drivers (partially) open source? Can't the change be reverted?

replies(1): >>40718373 #
5. formerly_proven ◴[18 Jun 24 11:01 UTC] No.40716255[source]▶
It's kinda curious that AMD GPUs still don't have idiot-proof power management. Can you still blow them up from software as well?
6. forbiddenlake ◴[18 Jun 24 14:39 UTC] No.40718373[source]▶
Yes, for example, the alternative kernel, Zen, did so.

https://github.com/zen-kernel/zen-kernel/issues/344