This site is being deprecated.
Please see the official X‑Plane Support page for help.
X-Plane will be limited by either the CPU or GPU, whichever is less powerful. X-Plane 10 has a lot of individual rendering settings you can tweak that can make small or large impacts on performance. I recommend you take a look at these tips from the manual if you haven't before.
This site is no longer being actively maintained.