This is the largest performance killer. Disabling MSAA entirely and using FXAA instead can provide a massive FPS boost (up to 30-40%) with minimal visual loss.
Setting reflections to "High" instead of "Ultra" and disabling Reflection MSAA entirely can save up to 20 FPS . GTA 5 Best FPS Boost Guide 2023
For players on lower-end hardware or those seeking every possible frame, these deeper tweaks are effective: This is the largest performance killer
Create a commandline.txt file in your main GTA 5 folder to add parameters like -disableHyperthreading (for older CPUs) or -FrameQueueLimit 1 to reduce input lag. For players on lower-end hardware or those seeking
The following settings have the most significant impact on your framerate and should be lowered first if you are struggling with performance:
Set your power management mode to "Prefer Maximum Performance" and cap your global framerate to 3 FPS below your monitor's refresh rate (e.g., 141 FPS for a 144Hz screen) to prevent engine instability.
Enable Game Mode and Hardware-Accelerated GPU Scheduling in Windows settings to prioritize the game's access to hardware resources.