this post was submitted on 28 Sep 2025
35 points (100.0% liked)
Linux Gaming
21377 readers
77 users here now
Discussions and news about gaming on the GNU/Linux family of operating systems (including the Steam Deck). Potentially a $HOME away from home for disgruntled /r/linux_gaming denizens of the redditarian demesne.
This page can be subscribed to via RSS.
Original /r/linux_gaming pengwing by uoou.
No memes/shitposts/low-effort posts, please.
Resources
WWW:
Discord:
IRC:
Matrix:
Telegram:
founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Yes, it's the INT8, not FP8 version.
Why would FSR had anything to do with input lag? The only reason why input lag would increase is due to FSR4 being more difficult to run on RDNA2 which would be due to lower FPS as FPS is also directly tied to input lag.
But we are talking about 120FPS vs 150FPS here when comparing Quality Presets so I doubt you could even tell. And even if you can, just lower the preset, it will still look better and get you to the same performance.
From multiple games I've tested so far my conclusion is that I am almost always CPU limited in most games even with 5800X3D (in CP2077, Hogwards Legacy, Kingdom Come Deliverance 2), most areas are CPU heavy due to a lot of NPCs and FPS drops in those areas enough where my GPU is bored, the only benefit of FSR in those areas is that FSR4 looks better but wont yield any performance benefits.
Input lag is caused by frame interpolation, right? Or nah?
It's because game logic is calculated on real frames and these things lower the real frame rate even though they give you more rendered frames. If you were getting 40 real FPS, and then you go to 30 real fps, you will feel a significant amount of lag even if you are getting 60 fps in fake frames. Basically the game loop is running slower and stuff like input polling is happening slower even if you have a higher frame rate.
It's kinda the same thing. You get input lag based on the real framerate. Since interpolation requires some extra performance the base framerate will likely be a bit lower than the framerate without interpolation which will case an increase in input lag while providing smoother image.
It seems that the input lag is more perceived, rather than actually experienced, from what I understand. Like if you go from 30 to 120 fps, you expect the input lag to decrease, but since it stays the same (or slightly worse), you perceive it to be much more severe.
The frame rate isnt going from 30 to 120 FPS. It's actually going from 30 to like 20. The rendered frames are different then the CPU frames which handles the game loops, (physics, input, simulation, etc)
yes, that’s why FPS in this case is not a good measure of performance
Very much so. The very reason why we want more fps is to have less input lag, that's my personal take anyway. That's the only reason why I have a beefy computer, so the game can respond quicker (and give me feedback quicker as well).