A guy on IRC Slush's pool said his was resetting every 2 minutes after he placed all 10 on the back plain.  After some testing, they were stable with 7 blades.  At which point he shared his PSU.  I didnt write down the name of what PSU he had but another member recommended this PSU to him:

http://www.amazon.com/HP-403781-001-DL380-1000W-Supply/dp/B001U0EM1W/ref=sr_1_2?ie=UTF8&qid=1385616853&sr=8-2&keywords=ATSN+7001044-Y000

Thats about as much info as I can give you since i dont own the blades.