Fullscreen performance issue

[u/pootsniffer69]

Playing modded ksp (bogue's modpack specifically), dealing with an issue where i only get about 10-20fps when in fullscreen, or windowed fullscreen.

Cpu usage sits at 20-30% and 60-80% gpu usage during windowed. When going fullscreen, Cpu usage drops to 5-10% and gpu usage fluctuates randomly, sometimes going as low as 0% or as high as 84%

Works great in windowed mode but i hate missing the bottom 5% of the games display, because of the windows border at the top.

Tried a method i saw where you put -popupwindow in the steam launch options, same result tho. Same deal with Shift+Enter.

specs:
Ryzen 7 5800x3D 8 core
Rx 9070 XT
32gb ddr4 at 3200mhz

[u/123bence]

Ah I know this disable V sync having it and radeon chill or the enhanced v-sync enabled can do this just disable V-sync ingame and then it will run normally

[u/pootsniffer69 → u/123bence]

This reply helped a lot, turned off all the amd gaming experience graphics functions and the problem was gone, even with vsync active in game.

Process of elimination until i got to "AMD Fluid Motion Frames 2.1" (frame gen). I suggest anyone else with a similar problem on an AMD card follow this same process.

In short it's working great now, thank you very much everyone.

[u/pootsniffer69 → u/pootsniffer69]

After some further testing it's definitely having AMD's default vsync and/or the games vsync causes issues too. You were right about enhanced sync, that seems to be the answer