Graphic Card support:
X-Plane 10 requires, at the *minimum*,
a 2 GHz, dual-core CPU,
2 GB of RAM, and
a DirectX 9-capable video card with 128 MB of on-board, dedicated video RAM (VRAM). See link for compatibility and graphics cards.
However, *for the best experience*, we recommend the following:
a 3 GHz, multi-core CPU (or, even better, multiple processors),
4 GB of RAM, and
a DirectX 10-capable (DX11 preferred) video card with 1 GB of on-board, dedicated VRAM.
X-Plane will take advantage of as many cores or distinct processors as you can afford. Having 16 cores split among 4 CPUs is not required by any means, but Version 10 would be able to use every one. No more than 4 GB of RAM is necessary, but the more VRAM you have, the better–X-Plane 10 can easily use 1.5 GB of VRAM at the maximum settings.