Hey,
The game is quite poorly optimised, but it should be running smoothly on your rig. No idea without being able to check myself unfortunately :/
The game is usually CPU limited though.
only thing i can think of is to force my CPU to run at full 4 ghz speed through Power Options, and see if this makes any difference.
Then again, this game is still in prototype/non-optimized stage anyway as you said. Will see if forced 4 ghz constant on CPU will do anything.