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Please see the official X‑Plane Support page for help.
Not really know what you mean with "GPU Accelerator", as all modern card have hardware acceleration,but yes you of course need one to run this...
Take a look at the system requirements:
X-Plane 10 requires, at the minimum,
Thanks for explaining the basics... I am talking about server hardware, like the following: http://www.nvidia.com/object/tesla-servers.html or http://www.amd.com/en-us/products/graphics/server/s9300-x2# . From what I can tell, there does not seem to be any benefit from this type of hardware unless it's built into the software.
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