I use to start off every power supply review by saying that the power supply is the most overlooked component of the computer.  I really don't think that's the case anymore.  Most enthusiasts that build computers are very aware of the importance of a good quality power supply.  What I'm seeing now is that people are buying into the marketing that you need a 1000watt or larger power supply to run your computer.  Maybe it's not marketing.  Maybe you really need a large power supply.  Sigma has sent over a 635 watt power supply.  Let's see if it has enough juice to run a decent rig.

Features and Specifications:

• High quality black mesh wrap for main ATX cabling.

• High grade 0.2mm aluminum housing with heat dissipating fins

• AMD / Intel Dual Core support

• SLI / Cross-fire Ready

• Dual 80mm blue LED cooling fans that keep airflow circulating through the psu.

• Hexflo honeycomb technology for maximum airflow

• Shark Fins that dissipate heat away from the psu!

• All the connectors you can possibly need!!

• All wires are wrapped with mesh cabling.

• Next Generation +12V rails (12V1, 12V2) support high-end graphic cards and PC systems

• Complies with ATX 12V 2.0, 2.1, 2.2 & EPS 12V

• Independent voltage circuit offers unflappable current delivery under heavy load and stabilizes voltage output

• Protections include Over current, Over voltage, and Short-circuit protections

• High efficiency (up to 80%)