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Sigma Shark 635 Watt ATX Power Supply Review


Now that we have the Shark unpacked, let's take an even closer look and see what sets this predator apart from the rest of the pack. First, with the outside you can see the voltage chart on the top of the unit. This gives the ranges for the voltage levels you need. When you flip it over you get a really good look at the two 80mm blue LED fans that pull in air from the case and spit it out to cool the internals of the power supply. 





Now for the front and back of the unit. You will notice the holes in the housing. This is the Hexflo honeycomb technology that Sigma uses to promote maximum airflow keeping the inside of the PSU from over-heating. You can also see the weird fin-like metal by the fans. This turns the aluminum housing into one big heatsink, pulling the hot air from the inside of the PSU and dissipating it into the flow of air from the case. This PSU stays cool to the touch, even under full load. On the back side, you have a standard wall plug outlet the power switch and the 110 to 240 switch.



Finally, you can see the meshing that covers the cables. You can see the effort that went into manufacturing this, because all of the cables are meshed perfectly and the shrink wrap is placed in the exact spots to keep the mesh from coming undone. This shows the time and work that went into making this unit and the dedication Sigma has to making its customers happy.


Now that the outside is out of the way, let's open her up and take a look inside. I do want to warn you that opening your power supply will void your warranty, as the company places tell-tale signs that will alert them if you open it. Since this is a critical working component, you may need the warranty one day. That aside, this is a power converter and is HIGHLY DANGEROUS! One wrong move, or touching the internals, even when it is not plugged in, can give off a fatal jolt of electricity. The capacitors in the unit can hold a charge for hours or even days, so I urge you to not open a power supply. That is what we, the professionals, are here for - so you do not have to take the risk.

With that aside, here is the core of this monster of a power supply. Here you can get a view of the two 12 volt rails used in this PSU, to balance power for your system and the large capacitors to keep the power continuous. You can also get a better look at the time and craftsmanship that went into making the power supply.



Now let's get a closer look at the connections and the inside of the power supply.

  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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