This site is being deprecated.
Please see the official X‑Plane Support page for help.
X-Plane does not support using SLI. To increase the FPS we recommend starting with the rendering presets. With a high end GPU like the Titan, you can try High or Extreme. For additional expert tips on tweaking rendering settings for better frame rate, see this developer article. Things like clouds, HDR mode, high LOD, etc can have drastic impacts on frame rate.
This site is no longer being actively maintained.