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AMD APUs, like the one that Steam Deck has, might get FSR 4 support next year thanks to the tech expanding beyond discreet top-of-the-line GPUs (www.techspot.com)
submitted 1 day ago by to c/steamdeck@sopuli.xyz
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While the support itself doesn't necessarily mean OS-level toggle like the Steam Deck has right (which I believe is still at FSR 1), it still could be a nice touch for the titles that choose to implement FSR 4.

Maybe the community adds the OS-level support unofficially, somewhat similarly to Lossless Scaling right now (although perhaps for free). This is just my uneducated guesswork, please see this comment for proper expectations:

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[–] -1 points 22 hours ago* (3 children)

You swap it with whatever upscalers it already has, yes. But not all games have any FSR or even DLSS support. Some only have XeSS, and you can replace that with FSR or DLSS using the utility. If it never had any kind of FSR support what-so-ever, how is it able to work at all?

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  • [–] 4 points 22 hours ago (2 children)

    If it never had even FSR1 support, how is it able to work at all?

    I did not say this, where do you get that? I explained that FSR 1 is different from all other upsalers, it is not comparable to all of the other methods. FSR 1 is like a Photoshop filter, while the other methods have builtin data from game. You cannot add a Temporal Upscaler to a game that does not have any. You cannot use OptiScaler on a game that does not have any upscaling at all, it needs DLSS 2 or higher, or FSR 2 or higher, or XeSS, because those have the training data using Ai with the game builtin. You cannot use OptiScaler without any of these, or with FSR 1.

    What exactly am I wrong about?

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  • [–] 2 points 22 hours ago (1 child)

    I am not saying you're wrong, I'm trying to understand what you posted. But I see what you mean now. I was under the impression the training data was specifically for the specific upscaler so FSR4 would need at least FSR2 supported natively.

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  • [–] 2 points 22 hours ago

    Oh, no no, I did not say or imply that. I was concerned about FSR 1 and the difference to the other upscalers. And the difference between the second new mode of FSR 4 that is not available on any other. So even if you have DLSS or FSR 3, you can only use the Temporal variant of FSR 4, not its ML-based variant (if I understand it correctly). At least that is what I said, so its probably true (self irony).

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