Hi mate,

As you have 3 different graphics card, your cgminer settings should state a different arguments for each card, separated by a ","
Here you only have a "generic" setting for all your cards, and I believe that is why you don't reach their full potential.

Also I would not use afterburner to set the core clock and mem clock, but add them to the .conf (also separated by "," for each card, in order)