Slow conversiion time with Nvidia GPU enabled

I got a Win10 desktop machine and an Nvidia Geforce RTX 2060 graphics card, and Nvidia Studio Driver v551.61.

I followed the instructions here but the driver v353.90 was giving me an error that it’s not compatible.

When I am converting the videos now it seems to be quite slow.
When choosing the Expert Settings, i have Nvidia on for hardware enconding.

Is there anything else I can do to use another driver? Or does anyone have any recommendation to improve conversion time?

Thank you!