after seeing your scores and hearing about the stuttering, it seems clear that the limiting factor in your t-bird system is the mobo. if all things are the same and your scores post the way they do, your pIII isn't beating your t-bird but since the stuttering is still happening, it has to be something to do with the mobo. make sure that you have flashed the lastest version of your motherboard's bios and see if that doesn't clear things up. if not come back and we'll see if there isn't anything else to be done.
<font color=red>booyah, grandma, booyah..</font color=red>
<font color=red>booyah, grandma, booyah..</font color=red>