what command line options you mean?
If you do not know that answer you don't have full command of mining with the avalon 841
I have complete instructions.
give me 1 minute
this all is for just the A841
https://bitcointalksearch.org/topic/m.37014814
overclocking means loud hot running
underclocking means quiet cooler running.
overclocking with current prices means you lose more money since the gear is not efficient.
under clocking with current prices means you lose less money since the gear is more efficient.
you need a powerful psu to over clock say 2000 watts
you need a cold room to over clock
you can have a weaker psu to under clock say 1200-1400 watts
if your power is lower then 3 cents a kwatt
if your power psu is strong 2000 watts
if your room is cold
if you don't give a shit about noise
Over clock the gear.
if your power cost is 3 to 7 cents underclock
if you power cost is 8 cents or more this gear loses money right now.
