You could always softmod an Xbox and use the CPS-3 emu whose name escapes me right now.
SF3 does not run perfectly on Xbox although it is damn good. You don't need top specs to run it on PC 2.4ghz P4 with about 512mb ram should run it fine.
I run CPS3 on a old P3 1ghz laptop with 512 of RAM plays quite well only thing is the CPU sits at 99% all the time. Can't run it very well in MAME with that spec.
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