SilverStone Zeus ST65ZF 650W - Page 6

Written by John Chen    Sunday, 06 November 2005 11:00
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Dual 12v rails on new power supplies are becoming quite common.  The ST65ZF comes with quad 12v rails!  This means that each additional rail helps reduce the stress when the demand becomes too high.  The four 12v rails add up to a whopping total of 55A!  But SilverStone specified that the combined amps for the 12v rails shall not exceed 42A.  Such a high division would only mean that the 3.3v and 5v rails are not extremely high.  The 3.3v comes with 33A, which is quite normal, and the 5v comes with 24A, which is a little lacking when compared to competitors. 

The ST65ZF comes with quite a few protections.

  • Over current protection
  • Under voltage protection
  • Over voltage protection
  • Short circuit
  • No load operation

The PSU is also rated with an efficiency of 75.8%.  The higher the percentage, the better.  The power supply efficiency means more of the electricity coming in from the outlet is being used, which means a less costly electricity bill.  75% is pretty decent for a power supply right now, but I have been seeing quite a few competitors providing up to 80%. 

As suspected, the single 80mm fan used for cooling does become rather loud when the load increases.  The fan speed is automatically adjusted by the power supply, but even the minimum 29 dBA measure is a tad loud.  Silent enthusiasts will definitely be a turned off.  Unfortunately, that is the kind of sacrifice you have to make sometimes.