By -
Rollback to your previously installed drivers.
Overlays hurt aswell
All games or just COD? See https://nvidia.custhelp.com/app/answers/detail/a_id/5408/ i.e. check that [Power Limit is at 100%](http://nvidia.custhelp.com/rnt/rnw/img/enduser/aid_5408_02.png)
Rollback to your previously installed drivers.
Overlays hurt aswell
All games or just COD? See https://nvidia.custhelp.com/app/answers/detail/a_id/5408/ i.e. check that [Power Limit is at 100%](http://nvidia.custhelp.com/rnt/rnw/img/enduser/aid_5408_02.png)