Zeus have 6 chips, You can't write something else than 6. Try --zeus-clk 338.
Ahhh thank you. Now i get this. Am i right to say, you cant write anything more than the chip they have ?
You could write anything you want...BUT Blizzard / Fury device still HAS ONLY 6 (SIX) hashing chips, soldered on it's board...which are used for hashing...nothing more...or less...