We just started using FSX for out the window visuals in our Gulfstream flight simulator used for engineering testing. We bought a Cybertron TGM2131B computer and are using a Optoma HD projector on a 10 foot screen in front of the cockpit. We feed our GPS position, heading and attitude to the game, close all windows so we just view the scenery. This computer has a i7 processor overclocked to 4ghz, there are two GTX570 cards sli'd together and the game is playing on a 160G SSD and there is 16G of RAM available. It is liquid cooled. We also use ORBX scenery for PNW. When flying today with no clouds and other AI for the first time with this rig I noticed that scenery is building in front of us as we fly, trees, buildings in the Seattle area. Also when you spin the plane around there is a lot of stuttering. Is this typical and what else can we do to make this as realistic as possible?