Capping Steam Deck display to 40Hz gives a big boost to battery life
Well, it looks like YouTuber The Phawx has found that sweetspot. By capping the Steam Deck’s display to 40Hz, he found that it was draining about 20W when playing Sekiro—that’s around two hours of play time. Running the same game with the display running at its full 60Hz without limiting the framerate was draining the battery around 25% faster (25W), even though the game was still only managing around 55-58fps.
It’s a nice improvement, but the catch is that you can only set a 40Hz refresh rate on your Steam Deck if you have Windows installed on it, as well as a tool called CRU (Custom Resolution Utility). For now, you can only set 30Hz and 60Hz refresh rates through SteamOS, though Steam Deck developer Pierre-Loup Griffais commented on The Phawx’s video on Twitter, saying that the feature will be “coming soon” to the Steam Deck. Griffais said that the main issue preventing FPS limiting on SteamOS has been the screen-blanking time when switching refresh rates, which certainly doesn’t sound like an insurmountable problem.
But before you abandon SteamOS and turn your Steam Deck into a handheld Microsoft Machine, bear in mind that Windows isn’t terribly well optimised for Steam Deck yet, and gaming performance will be less consistent than on SteamOS. It’s probably worth waiting until either Valve updates SteamOS to support that sweet 40Hz frametime limit, or the Steam Deck and Windows learn to play a little nicer together.
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Related Forum: PC Gaming Forum
Source: https://www.pcgamer.com/uk/capping-your-steam-deck-display-to-40hz-gives-a-big-boost-to-battery-life/
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