we allready knew about this one, but sadly my cards for some reason refuse to go as low as 150-200mhz for memory.
is there some bios version that allows you to reduce you clocks so low ?
there isn't one, but you could mod your own bios to do it using a bios editor (they exist, but as i haven't tried any myself i can't recommend one). why would you want your clocks so low?
Phate