well! i have a duron 1.0GHz and radeon 8500, and my cousin has athlon 1400 and radeon (i think it's ) 9200, and on her comp. slowdown is not so strong, but on my brothers celeron 400 & voodoo 3 3000;) (old i know) you need to look a while to see a character move;) (quad) .. hmm.. and the default color depth i have is 16bit.. i haven't tested on 32 becouse i thought that it wouldn't matter.