so this started happening to me near the start of the year, i thought it was my Graphics card on my Riser Cable that was having the issue, i spoke to Nvidia to try and fix it as my GPU Usage was hitting 98-100% causing the game to have lag issues, they tried to help with uninstalling my GPU completely and reinstalling it didnt work, i spoke to ASUS they couldnt help and then spoke to my retailer who took my 1080TI for testing didnt find the fault but offered me a new RTX 2080 to see if that fixes it, so i uninstalled my GPU completely again and installed the latest drivers for the RTX 2080 and still have the issue.

so my 1080TI and now my RTX 2080 both have this high GPU Issue, if i limit my FPS down to 60 my GPU Usage drops like a stone and stays around 45%, Uncapped like i use to (FPS around 140 @ 2560*1080) my GPU hits 98-100% even on 1080p its 98-100%, there has to be something wrong here or the game isnt liking the Nvidia drivers

CPU: Intel Core i7 8700k @ 4.5GHZ (Overclocked)
GPU: (Previous) Asus Strix GTX 1080ti OC, (Now) Asus Strix RTX 2080 OC
Motherboard: Asus Maximus X Hero
Ram: 16GB G Skill DDR4
SSD: 500gb Samsung Evo 860 m.2 (game installed here)
Cooler: Custom Water Cooler (temps dont even hit above 45 Degrees C)
Nvidia Driver: always up to date so right now its 431.36

now the funny thing is before i built this PC i had a 4th gen i7, 16gb ddr3, msi gaming 3 board and a msi gtx 970, and i never had this issue lol, i ran the game on maximum with that and never once had an issue, i run the game maximum on here and get very high gpu usage on 2 cards that ive tried but now i have to cap my FPS in order to play without delays to skills and such

hope some of this info helps figure it out cause id like to uncap my FPS again without my GPU having a hissy fit and put my monitor back to 144hz while playing 14, i don't like having to limit my monitor and pc when it should literally laugh at what needs using