I also bought one from Minersource.net. I can only get mine to hash at like 2-12GH/s and it is very very unstable at best. I was probably the first one to speak to your support guy on the number from my S3. He remoted in and was able to find a few freq's that worked but nothing was stable at all. So basically it is a pretty paper weight..... I was so looking forward to these too....
Bitmain Tech and Minersource User: (Mailed to person from Bitmain. As it is my email addie.)