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RDNA2 FSR4 Performance vs FSR3 Quality (www.youtube.com)
submitted 3 weeks ago by WereCat@lemmy.world to c/linux_gaming@lemmy.world
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I was trying out FSR4 on my RX 6800 XT, Fedora 42. Works really well and it easily beats FSR3 in visuals even on Performance. It does have a significant performance hit vs FSR3 though but it still works out to be a bit faster than a native rendering on Quality.

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[-] victorz@lemmy.world 1 points 3 weeks ago

Oh yeah, now I remember why there's more input lag with frame interpolation turned on. Taking a shot right now and now it pops into my head.

Anyway, it's because while the frame interpolation adds more frames per second, the "I-frames"—or real frames—you're seeing are lagging behind one I-frame. This is because it can't start showing you interpolated frames until it has two frames it can interpolate between.

So you won't start seeing I-frame N-1 until I-frame N (the latest I-frame) has been generated, thus creating extra input lag.

Someone correct me if I'm wrong, I'm supposed to be asleep...

this post was submitted on 28 Sep 2025
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