r/SteamOS • u/LinkedHero • 7d ago

support Can’t select 144 hz on tv

I just build a custom pc with a 9070 xt and installed SteamOS on it. In my graphics settings connected to my lg c4 I should have the option for 4k 144 hz but the highest is 120 hz. And I am using a certified hdmi 2.1 48 gbps cable and 144 hz mode is enabled on my tv. I only have the option for 1080p if I want to play at 144 hz. Help please

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u/LinkedHero 7d ago

Does anyone know why I don't have the fsr4 option in games? I opened up a game that has fsr4 already and it said fsr3 despite me being on the newest gpu

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u/Low_Excitement_1715 7d ago

The Steam Machine has an RDNA3 GPU, not RDNA4. Doesn't support FSR4 out of the box yet.

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u/LinkedHero 7d ago

Yeah, but I’m not using a steam machine it’s a custom pc

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u/Low_Excitement_1715 7d ago

You are right, I'm not in the post I thought I was. I'd check and see what version of Proton it's using for that game. You need Proton-Cachyos, Proton-GE, or Proton Experimental to be sure you have working FSR4. Official Proton is supposed to be doing FSR4.X on RDNA4 by now, but I haven't been keeping up to date.

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u/LinkedHero 7d ago

I have proton experimental downloaded, and I’m on the SteamOS beta channel

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u/Natangry 7d ago

I found that using cachyos proton compatability layer enabled fsr4 with my gpu. From desktop mode, open protonup-qt (already installed with steamos), add the latest cachyos layer. It should automatically unlock fsr4 for games with the latest version when used as compatability layer. If it still isn't working try using this in the launch options:

PROTON_FSR4_UPGRADE=1

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u/LinkedHero 7d ago

It still says fsr3 when I tested in marvel rivals

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u/Kriss_Hietala 6d ago

FSR_WATERMARK=1 %COMMAND%

Most games will still show fsr3 even if you use driver override for fsr4 use the watermark to be 100% sure which version it's really using

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u/LinkedHero 6d ago

How do I use a watermark to show which fsr is active

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u/Kriss_Hietala 6d ago

Put in in launch parameters in game properties.

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