This might help you https://www.facebook.com/Bitmaintech.Antminer  : face book   and on bit mains  site under batch 3  it says somerthing aobut what you asking  so that PSU should  be fine if your not worried about speeds .

When better power efficiency is needed in the future due to higher network difficulties, you may want to buy some special PSUs 9V DC with more than 10A output, which will allow you to have a 0.2J/GH mining efficiency, but at lower hashing speed.


 but they are right you will need a higher PSU if you plan to over clock i used that as a example nothing more.  just to make a point that it should be ok under clocked by what the tech's  say on bit mains site i think i need to stress that and what others say here before some one take what i said in the wrong light.


I have Six of batch 4 coming  over the next 7 weeks or sooner  two this week and two more the next week then two more maybe three weeks later. selling stuff on E bay .