Go to this page and see if you have any of this installed: A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums
Also, unplug one monitor at a time and see if performance goes up after any one of them have been unplugged.
Go to this page and see if you have any of this installed: A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums
Also, unplug one monitor at a time and see if performance goes up after any one of them have been unplugged.