This site is being deprecated.
Please see the official X‑Plane Support page for help.
No system requirements have been finalized or announced for X-Plane 11. If you have seen any v11 system requirements somewhere they are unofficial and not endorsed by the developers of X-Plane.
With that said, I would guess that if you can run v10 you will be able to run v11. You may have to reduce settings or accept a lower frame rate. Also, there will be a free demo later on that you will be able to try before you buy.
This site is no longer being actively maintained.