I don't think so. As far as I know, Bryce doesn't support multiple processors in Windows. I've used Lighting on many PC's, but never on an Athlon MP. And, if it's not an Athlon MP, then you should save the dough and just buy a really nice Athlon XP or 64...! 8 processors? I've never seen one that could keep up with my Athlon singles, for daily use anyway... I could be wrong about multi-threading, though. I've never tried it on an MP. And I don't believe that Intel chips still exist, no matter what anyone tells me...!