Hello, I am facing the following really strange behavior. I set X-Plane to full screen mode and performance is rather poor (at ~20fps). I set X-Plane to Windowed mode, with the window maximized. The performance is exactly the same. Fianlly, I reduce just a notch the size of the window (so that the borders of the window are visible). The performance is boosted in a big way to 45fps - without altering any other rendering settings. I cannot understand this. I read somewhere that even at full screen, X-Plane is running in windowed mode from a drivers perspective, with the window decorations hidden. This would explain why in full screen mode and in maximized window the performance is the same. However, why is there such a huge performance gain with the window decorations shown, but a tiny change in the window size? My configuration is: CPU: i7 4770k GPU: NVidia GTX770 RAM: 16GB Below are some screenshots: Window with border: Window Maximized: Full screen: Thanks