One of the main reasons for Game DVR’s high CPU usage is the broadcast service.
Fix High CPU Usage by Game Bar or Game DVR So, if Game Bar’s CPU is high and causing problems, follow the below steps to reduce Game DVR CPU usage in Windows 10. This is especially true for simulation games as they are highly dependent on CPU resources.
As you can guess, using CPU resources can have a negative impact on gaming performance. As good as the Game Bar is feature is, depending on its configuration, it can consume quite a bit of CPU resources.