Epic Games has released a new alpha for Fortnite on PCs. It may lower the flagshi title's demand on memory and hard-drive space in order to increase FPS on devices with less powerful CPUs. Then again, it may also reduce detail and visual effects in-game.
https://www.notebookcheck.net/Epic-Games-announces-a-new-Performance-Mode-that-might-benefit-Fortnite-gameplay-on-older-PCs.510264.0.html