For people rapidly calling others idiots I guess you guys aren't really that smart.
I didn't say Power or Sparc.
There are multitudes of Numa based systems out there that are x86 based. They do not run AIX and they CAN NOT run windows for a multitude of reasons (one being that the node interconnects are FPGAs custom designed and trying to depend on micrsoft to modify windows to run a large scale numa architecture would be idiotic).
Windows has support for small numa systems, but it has been shown to not perform tasks nearly a well as its competitors.