i just started 3 boxing on my pc.. everything was fine until i went to orgrimmar and ouch. it took me probably 20 minutes to get from the entrance to rfc.

ive done a few things to fix this..

i copied my wow installation to 3 separate disks
on the followers i did three things:
i lowered the resolution to 800x600
i set the graphics to all the lowest settings
i set maxfps to 30 and maxfpsbk to 5

i now have no lag in orgrimmar or shattrath

amd x64 4200+
2gb ram
geforce 8600