That card can probably handle 60fps at medium settings running at 720p, but I can't say for sure with 900p. Do you have a 720 or 900p monitor?
Although, like others have said, it really does depend on the game so it's hard to say.
It would have not been easy to make an accurate guess on the number of CUDA cores or clock speeds, though...
Another app by the same developer called CPU-L had specs for the i5-9600k well before it's announcement..