agner's blog has some info on this mess - lots actually.
Just by switching the CPUID dispatcher, they got a 50% improvement on a VIA cpu. !!!! and some 25% on an AMD. just by identify it as a phony "genuine intel".
LINK quoted below:
http://www.electronicsweekly.com/blogs/david-manners-semiconductor-blog/2009/12/intel-skewed-compilers-to-slow.html
= but here's the general scoop =
"Apparently, Intel also put code its compilers which would slow down any PC which used an AMD chip.
"Allegedly, Intel secretly redesigned key software, known as a compiler, in a way that deliberately stunted the performance of competitors' CPU chips', says the FTC, '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."
= AND IT GETS WORSE = in the gpu scene.
"After illegally skewing the CPU market, Intel then turned to trying to skew the GPU market, says the FTC.
GPUs have lessened the need for CPUs, says the FTC, and therefore pose a threat to Intel's monopoly power.
The FTC states: 'Intel has responded to this competitive challenge by embarking on a similar anticompetitive strategy,
which aims to preserve its CPU monopoly by smothering potential competition from GPU chips such as those made by Nvidia, the FTC complaint charges. As part of this latest campaign, Intel misled and deceived potential competitors in order to protect its monopoly. The complaint alleges that there also is a dangerous probability that Intel's unfair methods of competition could allow it to extend its monopoly into the GPU chip markets. '
= ABOVE THE LAW? =
"The FTC is the fifth anti-trust action to be brought against Intel. In actions by Korea, Japan and Europe, Intel has been found guilty of anti-trust illegalities and fined; a fourth action from the State of New York has still to be heard. The FTC's action makes it five".
= AND EVEN THE STOCKHOLDERS ARE GUNNING THEM =
"Meanwhile Intel's shareholders are bringing civil class actions against Intel and its management alleging that shareholders' interests have been damaged by Intel's alleged anti-competitive practices".
HERE'S AGNER'S BLOG INFO: linked and discussed at amdzone with special appearance by agner himself
http://www.amdzone.com/phpbb3/viewtopic.php?f=52&t=137238
and the blog itself:
http://www.agner.org/optimize/blog/read.php?i=25
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This is a good read. This is what the fuss is all about. And there are many other articles.