for those having power supply problems - I am interested what your room temp is at.  if i understand correctly higher temps = lower efficiency so you cannot expect the power supply to perform the same at 60 degrees F (15.5 Celsius) vs 80 degrees F (26.5 Celsius).  this also would make a difference as to where it is pulling air from (inside the case B2's vs outside the case B2's).  i for one replaced mine about 2 hrs after receiving it due to the fact that i wanted to overclock it (if possible).  but i did not have any problems with my unit using the stock PS with the room temp at 60 degrees F or below.