I am using cgminer, currently using 2x 6950's mining at about 700(this is what is being shown in cgminer). I suppose there are hardware errors on my end causing the hashrate to drop. I'm a total noob to mining btw. So what can I do to get information / solving this problem?

Pool I am currently using to mine CHN coins: http://chn.u b 3 r l 3 3 t dot com/

Thanks in advance!