Set both to Low to save VRAM and improve stability.
Enable this in settings and use commands like -useallavailablecores to ensure the game utilizes your entire CPU. Windows & System Optimization How To Get MORE FPS on Low End PC in Fortnite S...
Keep this at 100% if possible, but lowering it to 75% can provide a massive FPS boost on very weak systems. Set both to Low to save VRAM and improve stability
Always use Fullscreen for the lowest input delay and best performance. Always use Fullscreen for the lowest input delay
Set to Performance - Lower Graphical Fidelity . This reduces visual quality but significantly increases FPS.
Go to your Library, click the three dots on Fortnite > Options, and uncheck High Resolution Textures . This saves over 14GB of space and reduces load times.
You can save system resources before even launching the game through the Epic Games Launcher :