WHAT AN EMBARRASSMENT FOR PAUL:
It is no coincidence that your X86 chipset artificially slows down your AMD processors. Intel did it. Intentionally. Illegally.
"Intel secretly redesigned key software, known as a compiler, in a way that deliberately stunted the performance of competitors’ CPU chips. Intel told its customers and the public that software performed better on Intel CPUs than on competitors’ CPUs, but the company deceived them by failing to disclose that these differences were due largely or entirely to Intel’s compiler design."
"...The code produced by the Intel compiler checks to see if it's running on an Intel chip. If not, it deliberately won't run SSE or SSE2 code, even if the chip capability flags (avaialble [sic] through the 'cpuid' instruction) say that it can. In other words, the code has been nobbled to run slower on non-Intel chips."
Wow, that is nastier and dirtier than my uncle's recycled briefs!
Intel software certainly has to check certain features available before taking advantage of it. Intel cannot rely on third parties features to use them because the owner may change those featrues in the future without notifying Intel. Those changes may crash the software, or make it incompatible.
This is a common practice in software design.