[mikets]

Originally Posted by davidthefat

According to Intel there is http://www.intel.com/products/processor/manuals/
And I read that Intanium was the one that was NOT compatible with x86, that is why Intel uses AMD's x86-64 architecture.

Well, I guess I did not follow the Intel terminology as close as I thought. In any case, Intel has three architectures: Itanium 64 (IA64) is not compatible with anything, x64 which is compatible with amd64 and the old 32-bit whatever it is called (x86).