If anyone has been having trouble with your fps capping randomly and having really bad horizontal screen tear recently you have to...
For Games and Ect.
If that didnt fix your issue... turn off all gamebar and xbox dvr functions
Random Reboot on battery.
Download/install the 1.1.0 Bios www.dell.com/.../driversdetails
Thanks for posting your solution. It's great that you're sharing your knowledge with the rest of the Community.