Thank you for the driver update, I did as you said, except that my monitor can't be connected to the graphics card directly, since the monitor only has a display port and the graphics card only has a HDMI slot and I don't own the right adapter to make that fit. (Plus today is a holiday, so I can't go out and buy one.)
So, I searched if there's a way to make the pc use the NVIDIA gpu instead, and found that you can just tell it to in the graphics settings, which I did. But now my game is crashing right from the start. I don't know why, first it needs an eternity to even start loading and then the screen is purely white and won't react anymore.
Also, I found that it is still using a lot of RAM.
Update: I tested out Sims Medieval, seems to have a similar problem, starts to load, but does not work. So I tested on other two other games not connected to the EA App, namely I tried it with CK3 and my old beloved Sims 2. Both worked fine, also told to use the NVIDIA-gpu. Maybe it's an issue with the EA-App or something?