hey I had problem too with the 5700xt but I resolved with following things
press "windows"+R and type "msconfig"
in "services" (third tab) disable "AMD External events Utility" and "AMD Log Utlity". (
https://i.gyazo.com/a5e0f7b64ab5141508fdc4d21f3b7846.png)
Reboot and hope!
also try this command in cmd for enabling windows power plan on
ultimate
powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61
View attachment 160366
also make sure you have your windows game mode on
hope you resolve!! I play with around 220/270fps in MP , and around 180-200 in warzone , before those fix i was around 100fps stuttering all around the map.