i don't know why its such a PITA on a Beige G3 to get PCI extreme enabled for most (maybe its cause xpostfacto) or maybe its cause you are using panther i know that panther had issues with radeon cards (something to do with the driver) and that can be what is happening. have you tried to use a driver from ATI and then try to enable PCI extreme???

i didn't have any problems at all getting it enabled in tiger. i seen a huge performance gain when i enabled it. VLC play's allot better. i can encode a youtube video using tubesock and watching VLC with no difference in performance in video wile surfing on the web if something comes up. i have yet to have any issues with having PCI extreme enabled.

i can have allot of windows open and performance don't decrease. i have no ideal why PCI extreme runs so great on my system, and others either cant get it enabled or run into performance problems with having it enabled.

but i will take it cause it works good. the only thing i have a performance problem with is safari's scroll speed when flash is on a site. or playing a simple flash game. but that happens with or without PCI extreme enabled. makes no difference what so ever. so its nothing that having PCI extreme enabled or disabled will help