odd ball, again, at least in my case, a new cpu mobo & more mem helped fr. i built a 2nd puter using only 512 mb of ram & get 100 fr sitting in tower where before it was about oh heck i can't recall, but 45 fr was the best i had flying about now its held back only by monitor refresh rate.
i emailed hitech tech's & they said i needed another cpu. so i did it. i've seen no change in fr by disabling xp services a la black viper. maybe some have, i've not.
& my 2nd puter gets just as good fr as the one with the striped raid config.