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Kubuntu 20.04 runs the same game hotter on average than Ubuntu 20.04 Steam, Nvidia

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I do realize that it seems like margin of error, but this has been consistent across every install that I've done. On Steam, with the latest NVIDIA 470.86 drivers and with Kwin enabled or disabled while gaming on Kubuntu, it will consistently run the games 2-3 Celsius hotter than Ubuntu 20.04. An example game I've tested this on is Sekiro on Steam, in multiple circumstances and replicating in-game conditions, there will be a clear 2-3 Celsius difference with the house at the same temperature and allowing breaks between tests.

So I'm asking, is there a fundamental difference between Ubuntu with Gnome and Kubuntu that would cause a temperature difference such as this while gaming, or is it just a coincidence that it repeatedly does this and is margin of error? Both are running X, not Wayland. And are both using the same version of Proton 6.3-8 with shaders pre-cached.

My system specs if relevant: Ryzen 7 1800x, Nvidia GTX 980 ti SC.

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