this post was submitted on 05 Nov 2024
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Power off discrete GPU while not in use? (lemm.ee)
submitted 1 week ago by [email protected] to c/linux_gaming
15 comments fedilink hide all child comments
 

Hi guys!

I purchased a few months ago a new AMD PC, with a 7700 CPU, 32GB of RAM and a 7800XT GPU. I've noticed since, that my electric bill has been increased (compared to when I used an Intel i7 6700 with a 1070 GPU), I was wondering, is it possible to use a hybrid GPU setup kinda like laptops, where the iGPU from the CPU is activated for normal tasks, and the discrete GPU is only activated on demand? Would the GPU be unpowered/sleeping in the meantime?

....all this from a Linux perspective, I'm running Nobara 40.

Thanks!

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[–] LavenderDay3544 11 points 1 week ago (3 children)

Any halfways decent GPU driver and device firmware will put it into a low power state when it's idle.

[–] [email protected] 1 points 4 days ago (2 children)

Sadly ours isn't in this regard.

[–] LavenderDay3544 1 points 4 days ago (1 children)

I have an RTX 4090 and use the proprietary driver. It works just fine on Fedora and Windows 11 alike. So IDK what to tell you. AMD and Intel are even easier since the drivers are baked into the Linux kernel. I have an AMD iGPU in my desktop and an Intel one in my laptop. Both work just fine and handle power management correctly.

[–] [email protected] 1 points 3 days ago

It's nice that it's well integrated but that doesn't mean it works well.

Power management of AMDGPUs has always been an absolute shitshow from my perspective.

With dGPUs they've now resorted to always running them in the highest power mode because they couldn't get power management to properly function.

I can't speak for modern intel GPUs but my old ones were fine.