Sims 4 RTX 2060 unrecognized card/low fps

@troshalom  I've split your post into its own thread, and I also changed the title.

First of all, Sims 4, like all games, uses both CPU and GPU.  Any process your computer runs will use the processor, and more complicated tasks will require more processing power.  The question is not whether the game can be convinced to use the graphics card as opposed to the processor, it's why it's only using 40% of the GPU despite fps being low.

Do you have a max framerate set anywhere?  If so, please disable it for now.  Please disable GPU Tweak and your other Asus software as well, at least long enough to test: you can End Task in the Task Manager.  Then test in windowed fullscreen and windowed modes.

If that doesn't help, please try playing while your computer is not connected to the internet.  Some people have low fps only while there's an internet connection.  Whether this helps or not, please run a dxdiag and attach it to a post.

https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/

To get your card recognized, pull up the line in the .sgr file you've highlighted and change the device ID, showing as 0x1f08, to 0x1e89 (the ID of your card).  Save, quit, and launch the game once before checking config.log again.