To anyone experiencing the DX12 stutter I recommend you to try the following:

1.In Windows Settings search and open Exploit Protection
2.Click On the Program Settings Tab
3.Click On The + Add Programs To Customise
4.Click On Choose Exact File Path
5.Find Control_DX12.exe Click Open
6.Programs Settings For Game Opened ,Scroll Down To Control Flow Guard
7.Put Check Mark In Override System Settings And Turn From On To Off And Apply

After following those instructions my stutter is 100% gone and the game runs flawless, just thought I would share in case it helps others.