Hi,

Is anyone able to help me out?  I purchased 2 of the S3's and bought the Enermax Triatholor ECO 550W 80 Plus Bronze PSU (one for each S3).  It says the DC output is +12V 42A 504W.  I hooked one PCI-e connector to one side of the machine and hooked up another PCI-e to the opposite side using only two of the four connections.  The machine never reaches over 330 - 340 GH/s.  Do I need to overclock this machine to reach the 478 GH/s, or do I need to buy a bigger PSU, or both?  If I need a bigger PSU which is recommended?