Tom's Hardware is one of the few benchmarking outfits that uses SolidWorks in their testing. If you really need performance here is the setup for you: [URL]http://www20.tomshardware.com/cpu/20040927/opteron_vs_xeon-22.html[/URL] The 250 Opteron is between 17% and 34% faster than the fastest Xeon on SpecAPC. Note that the Intel Nocona had an unfair advantage in the SpecAPC test and still lost. "For the AGP tests with the Xeon together with E7505 and Opteron plus AMD's 8000-chipset, a Quadro FX 3000 was used, whereas the PCI-Express System based on the Xeon Nocona and E7525 was equipped with the Quadro FX 3400."
