I'm mining with an Antminer U2 in cgminer at 1.6gh/s. However, with the frequency set at 0981 I should be getting 2.0 gh/s. I'm using a powered hub providing 5v/3.5a and have the unit properly cooled with an Arctic Breeze fan (powered separately). I also have two bock erupters I'd like to run simultaneously but don't know how to accomplish this. Here is my .BAT for the Antminer:
cgminer.exe --bmsc-options 115200:20 -o stratum.btcguild.com:3333 -u worker -p pass --bmsc-freq 0981
http://imgur.com/zASiJScAny help is greatly appreciated.