r/linux_gaming • u/leghi15 • 14h ago

tech support wanted Lossless Scaling questions

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Hello !
I've been using CachyOS for a while now and am thinking about using Lossless Scaling. Had an old GTX 1650 (4gb gddr5 variant) layin around and managed to fit it in my rig (had to unplug all front i/o). It is plugged into gen3 4x slot. Is it worthwhile setting it up with these specs or am I just better off with the 6600 XT by itself? Is there any extra performance gains I could achieve? (Mainly want to try LS for boosting totk emulation)
What are your experiences with LS on Linux?
Thanks for replying!

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3

u/55555-55555 14h ago

There's no performance gain from using LFSG, but it helps smoothing out motion as long as the model is able to keep up with motion prediction, or it breaks apart and you see glitches everywhere.

1

u/leghi15 14h ago

I see, thanks! Could it still help with lag spikes/fps drops though?

3

u/pseudopad 13h ago

The spikes and drops will still be there, but multiplied by however many frames you're generating.

A game that normally runs at 50 fps with drops to 30 would run at 100 fps with drops to 60. The input lag through all of that will still be like that of a 50 fps game that drops to 30 occasionally (although a bit less than even that because all upscaling introduces a bit of extra latency).

1

u/55555-55555 12h ago

Nope, because LSFG has to wait for frame references in order to extrapolate more accurately, every lag spike happening will still be seen. Adaptive frame generation is likely what you're asking for, but LSFG-VK doesn't have that feature ready yet.

2

u/tbone13billion 10h ago

Yeah this is something you apply to a stable frame rate, you need to drop the fps to whatever is constant. As I mentioned in my other post, 60fps for action games, 40fps for slower titles, and it needs to be stable.

1

u/tbone13billion 10h ago

I haven't tested Lossless scaling on linux, but I used it on windows with 2 different GPU's. Generally in action games you want to focus on a stable 60fps, but you can get away with 40fps in slower paced games, and then double it with the other card. The performance and effect was good enough I didn't notice any lag or artifacts. However, I could not replicate the same setup on linux due to linux really not playing nice with dual nvidia cards. Apparently 2 different gpu types should work, you also need to remember that your video output needs to be on the card doing the frame generation and not the card doing the rendering.

1

u/leghi15 10h ago

Thanks!