Modern Warfare FPS Issue

Before the 06-11-2020 update I would be getting 100-120 FPS at 2560 x 1440 now after the update I am getting between 20-40 and have to drop down to 1920 x 1080 to get 100 FPS. Can someone help I am running a 3800x and a MSI 5700 xt Mech OC.

Blizzard Technical Support are only able to offer support for install and patching issues for Call of Duty games. For more details, please check out this post. Regarding the FPS issues, please contact Activision Support or refer to the Modern Warfare forums.

Since this is not a classic games issue, as mentioned on this post, this thread has been closed.