So i am using amr-stak with 8 msi rx580's armor oc. im getting about 3000 h/s and only pulling about 700 watts from the wall. Is this a decent hash rate. i have already made sure my gpu's are on compute mode and i have done whatever overclocking i can through msi afterburner. if my hash rate is too low what should i be doing differently? What's strange is when the miner starts the difficulty always decreases to about 400 before any of my shares are accepted by the pool.

thanks for your help.