Battlefront 2 constant low fps with good hardware

Hello,

the first day i installed bf2 it was running fine with around 90 fps when i was playing. When I started the game the day after the installation  i had only around 3-6 fps in the main menu and while playing. When i restarted the game it was running fine again. But since i starte bf2 on the third day, i always had those 3-6 fps everytime.

Here is what i tried to fix ist (none of it worked, it made no difference in fps at all)

- turning off direct x12

- run in window mode

- switch to lowest graphic

- reinstallation of the game

- installating newest hardware driver

- switching cable to another port on gpu

Do you have any more ideas to fix it? I cant play the game right now at all, really frustrating. 

It is really strange that the game was running fine at first, and the low fps occured all of a sudden. Also that the fps are stable 3-6, even if i switch from high to low graphics, is really weird.

I assume, that there is a bug that floods my ram, because in task manager it shows that the ram is at 99% working capacity (16gb ddr4, so definetly enough)

Thank you very much for every advice!