Hi guys,
I need your help. I bought a farm in Chinese on chips Avalon 3. In cgminer written that their hashrate about 800 GHash. The problem is that on the pool hashrate between 500 and 600 GHash.
Has anybody had a similar problem?

A little about the farm: it consists of 3 cards, and each card is detected cgminer as a separate device; each card is now working on the same worker.
I had the idea to distribute each card for different workers. I tried to set the parameters of the Cgminer to Load Balance and Balance but still only works Worker #1. Apparently I'm doing something wrong