It must be my expectations that are the problem if this is normal. I know fluctuation is normal. I just seen the advertised KH/s at 320-420, so I'd expect the average to be around 300 KH/s. I purchased a USB dual miner some time ago and it advertised 70KH/s and the average i got out of it was 65KH/s. Thanks for the info all.

So I purchased 3 Gridseed miners through zoomhash. I also got the preconfigured raspberry pi. The setup was easy and the gridseed began doing it's job. The problem I have is the KH rates are not what I expected. I understand there will be fluctuation, but i'm seeing on average a 400 KH/s rate for the 3 when I was expecting a 800-900 KH/s average. Is there anything I can do without harming the hardware to get these miners up to at least a 300 KH/s per miner?

I'm new to crypto currency and this forum. If i've posted this in the wrong area, please direct me to the right discussion.