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Sigma Shark 635 Watt ATX Power Supply Review



Now that the power supply has been installed, let's take a look at how it performs. I am going to monitor the voltage of each rail for the 3.3v, 5v, and 12v ranges and compare this 635w power supply to an Antec EarthWatts 500w PSU and the Cooler Master Real Power Pro 750w PSU. I will be testing the Idle and Loads variances using a Digital Multimeter. To get the load on the system I will be running Stressprime 2004 Orthos Edition for the CPU and Memory, HDTune for the hard drive and 3DMark06 for the video card.

Testing Setup:
  • Intel Core 2 Duo E6700 @ 2.66GHz
  • Abit IP35 "Dark Raider"
  • 2GB Corsair XMS2 DDR800
  • Sapphire X850XT
  • 1x Western Digital 80GB SATA HDD
  • Lite-On 8x DVD+/-RW Drive
  • Windows XP Professional w/SP2

Power Supplies Tested:
  • Sigma Shark 635W PSU
  • Antec EarthWatts 500W 80 Plus PSU
  • CoolerMaster Real Power Pro 750W PSU

Testing Equipment:
  • Sperry Industrial 18 Range Digital Multimeter.


First up are the 3.3 voltages. Remember you want to be as close to the 3.3v as possible.



Now we have the 5.0 volts



And lastly  for the 12 volt rails.



As you can see, the Sigma is right on-par with two well-known power supply manufacturers, showing the quality that went into making this unit. Even under a full stress load, the Shark kept the voltages needed, never dipping below the marks and thus giving you the power you need to run your system.

  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Closer Look (Cables)
  4. Installation
  5. Specifications & Features
  6. Testing
  7. Conclusion
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