Hi, have you tried reducing all the PC (non-VR) graphics settings to their minimums?
I have a G2 and I used to find it would take a couple of minutes before things were fluid. It would be quite jerky at first but would clear after a couple of minutes or so.
Someone suggested reducing the pc graphics settings… I did & now it’s fluid from the start.
I know it’s not exactly the same thing with your G1 but it might be worth a try.
Also you might want to try the latest nVidia graphics drivers (465.89) Some are saying it has improved performance… & it’s improved mine
Regards
Steve