I recently upgraded my GTX 1070 to a RTX 2080 TI and i mainly play fortnite but i cant even get 240FPS and the game stutters i have a Ryzen 9 3950x and my pc is not running like its supposed to , all my drivers are up to date too, i have 32 GB RAM DDR4 3200, PSU is a Corsair RM 750X , 500GB SSD, 2 TB HDD, Water cooling. and for some reason when im in a game my GPU usage is from 40-60% and its not running like its supposed to , plase help me