spre, your setup seems OK with me. In fact I am using a more "primitive" card GEForce4 MX440 and I'm getting a fps of 80-100, but with less demanding sceneries e.g. monument valley. Do you have any programs or spyware running in the background ? They can take up a lot of resources. You need to disable all of those. Also try using a simpler scenery without any clouds, trees, etc. Let me know how this works for you.