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This repository was archived by the owner on Aug 23, 2023. It is now read-only.
NGnius (Graham) edited this page Sep 22, 2022 · 31 revisions

Functionality

How does PowerTools work?

PowerTools interacts with the system in roughly the same way as outlined in here. PowerTools does not save any data by default; it reads and writes to the SteamOS system (mostly the Linux kernel). Since no data is saved, a reboot will reset all PowerTools settings back to default.

Why does PowerTools only let me select some values?

There's a few reasons for this, depending on the values in question, but it all stems from limits imposed by (or to protect) the hardware. Most limits can be justified by the specs of the Steam Deck or the allowed values for a specific kernel API.

How do I reset to default settings?

Restart your Steam Deck. Nothing in PowerTools is persistent, unless you enable persistence (in which case: turn off the toggle, then restart your Deck). Or just press the Default button, but I'd imagine you would have found that already.

Why is X the default?

I don't know, ask Valve. Most of the defaults are pretty logical, so none of them should be too objectionable.

What does disabling SMT do?

The SMT toggle in PowerTools doesn't technically disable SMT. Instead it disables every second CPU, since every group of two CPUs is one logical CPU core.

Why does disabling SMT speed up some games?

I don't really know. My theory, which is backed by exactly zero research and experiments, is that since SMT increases performance of a single core by less than 100% (usually it's closer to 30-50%), that 150% performance gets split between two threads, effectively reducing each thread's performance to 75% when both threads are under heavy load. It would then follow that disabling one of those threads would restore the remaining thread to 100% performance.

TLA (Three Letter Acronyms)

AMD

Advanced Micro Devices: the company that makes the processor in the Steam Deck

APU

"Accelerated" Processing Unit: the marketing term used by AMD for a CPU with an integrated GPU

CPU

Central Processing Unit: the main processor, the Steam Deck uses one with Zen2 architecture

GPU

Graphics Processing Unit: the graphics processor, the Steam Deck uses one with RDNA2 architecture

PPT

PowerPlay Table: the power settings for AMD GPUs

QAM

Quick Access Menu: the Steam Deck menu that comes up when you press the ... button

SMT

Simultaneous MultiThreading: The generic term for making one logical core act like more than one core, equivalent to Intel's "hyperthreading".

USDPL

No, that's five letters

Miscellaneous

Can this damage my Steam Deck?

Generally, user software can't damage hardware unless there are already existing issues. Of course, always use responsibly; don't be surprised by a fresh hole in the wall when swinging a hammer at it.

Does this work on SteamOS Beta versions?

Probably. It isn't tested on Beta because NGnius only has one Steam Deck, but the differences are usually too minor to cause major issues with PowerTools. Using PowerTools on SteamOS Beta isn't officially supported, which means bugs probably won't get fixed.

Why am I stuck in an unhappy marriage?

Because your failure to communicate and/or get a divorce have left you trapped in a prison of your own creation.

This is really great, how can I support you?

I already make enough money, thanks. If you really want, donate to some FOSS foundation and/or support a project that's mission critical.

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