I recently purchased a Gigabyte G1 gaming GTX 1080. When i play fortnite on low settings it only uses about 50%-60% of the GPU. I have a 144hz monitor and it will occasionally drop below 144fps. However, when I turn all the settings to epic, I get 130-150 fps and the 1080 is at 99%. Could someone please give me some of their thoughts on why this might be happening? P.S. I've tried things such as driver updates, and making sure the power mode is on optimal performance in both windows and the nvidia control panel.