For real guys, you'r still mining with your 800 USD cards at 3$ / day profit ?    
Never heard of so much better ways than POW for making money ? You can't be serious...  

You must learn the meaning of the word : 'search smartly' how to make REAL profit..  

Ps : And don't think even 15$ / day for one card at 800$ + is a REAL profit..