So I updated my drivers, loaded RB6 and started playing. My FPS was at 50fps and I knew this was not correct (Ultra, maxed out at 1080p 144hz).
I look up and see advice. Go to Documents, My Games, RB6 and open the file and change GPUADAPATER=0 to =1 and I loaded the game and it switched it to my Intel Integrated Graphics. I re open file and change it back to =0 and now I am getting 140fps or more maxed out.
Might be worth a try if you are getting low FPS or even just curious.