Turn these OFF . Disabling shadows alone can boost FPS by up to 53% . Textures, Effects, and Post-Processing: Set these to Low .
You can further optimize the game before it even launches through the and configuration files. Low End PC Fortnite Fps Boost Guide v kapitole ...
Under Settings > Fortnite, check "Additional Command Line Arguments" and paste: -useallavailablecores -nosplash -limitclientticks . Turn these OFF