I don't know what kind of a Machine I need, but this lags to unplayable Amounts. I'm getting maybe 2-3 FPS. Have you checked how much Power it uses on your System? Are your Assets optimized or full of unnecessary Geometry? Do you use some form of fully dynamic Lighting everywhere for everything or something? Weird lighting on transparent Surfaces? Constantly running AI Logic, Physics on everything or something?
For Comparison, I'm on a Intel Xeon E3-1230 v5, 16GB DDR4, and GTX980.