Problems with Nvidia Quadro p520

The idea in this may or may not work for that card

https://community.adobe.com/t5/premiere-elements-discussions/rtx-2080-and-2080-ti-currently-not-supported-for-gpu-acceleration/td-p/12437459

Go to this page and scroll down to find the place to request that you be added to the Beta program... IF you are added you will be sent a small program to run, you may need to run that program 2-or-3 times to add your card... at least that is what happened for the card in my previous build

https://helpx.adobe.com/premiere-elements/using/gpu-acceleration.html

There is no way to forecast that.  Premiere Elements features upgrades occur annually.  There is a "beta" program where you can volunteer to help 'test' your version of a GPU.  

For whatever it might be worth, I put my name into the beta program.  After several weeks I got a response and my GPU was added.  Some things are a little quicker.  But, unless you are doing lengthy videos with a lot of tracks, adjustments and effects, you might not notice a lot of improvement.