Does it run any differently or do you just see different memory usage?
Can you take an ingame screenshot with the command "perfoverlay.drawgraph 1" running?
Does it help setting the framerate limiter to 120?
The reason I doubt your 5-9GB memory usage is that I've never heard of it being that high, this is my at 1440p all ultra and I barely use over 4GB.
Try dropping back to 411.70 at this link as a test to be sure it is not a video driver issue.
I am aware of performance issues with 416.16 and some reporting BF1 crashing with 416.34
Edit - example report at this link
take the system to a clean boot per this link for now while troubleshooting just to be as sure as much as possible a 3rd party program is not interfering.
@proxos666
Didn't help whit the cpu usage. CPU is 97-100% and battlefield.exe is using 90-96%.
RAM usage on battlefield didn't go over 3.8GB
All this info was taken from taskmanager on second monitor
