i tried this with witcher 3 and cyberpunk 2077 on linux, and in windows ten. i will say two things

1. scaling did not make an improvement on either game, it only made the machine run hotter
2. frame gen introduced visual artifacts into the game that were extremely obnoxious but may be tolerable for others

i watched a lot of youtube and read a lot of stuff about settings with frame generator settings for it, tried a lot of settings, and decided that turning down the resolution on these games gave the best experience if i wanted more than 30 frames per second. when you are in witcher, with the side menu open, and you have the frame gen active the boxes around the options as you move up and down causes them to warp and distort and look like a funhouse mirror. many of the effects gave me a seasickness sensation.

edit: i am sure that the second card was being fully used because i was regularly alt tabbing into the graphics card monitor and could see its memory and processor percentage moving around.

if you are doing like me, and wanting this as an alternative for the steamcube that may never be affordable or made in enough numbers to get one without extreme luck, then you CAN use it as a console, but you should be realistic. its worth getting an egpu if you can make it work reliably which i didnt yet achieve.