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Home » Power
Enermax ECO80+ 620 W Power Supply Review
Author: Gabriel Torres 48,095 views
Type: Reviews Last Updated: July 9, 2009
Page: 3 of 10
Transient Filtering Stage
Hardware Secrets Golden Award

As we have mentioned in other articles and reviews, the first place we look when opening a power supply for a hint about its quality, is its filtering stage. The recommended components for this stage are two ferrite coils, two ceramic capacitors (Y capacitors, usually blue), one metalized polyester capacitor (X capacitor), and one MOV (Metal-Oxide Varistor). Very low-end power supplies use fewer components, usually removing the MOV and the first coil.

The transient filtering stage from this power supply is flawless, providing two Y capacitors and one ferrite coil more than required, plus one X capacitor after the rectifying bridge. The MOV is located after the bridge and not before as usual.

Enermax ECO 80+ 620 W power supply
click to enlarge
Figure 8: Transient filtering stage (part 1).

Enermax ECO 80+ 620 W power supply
click to enlarge
Figure 9: Transient filtering stage (part 2).

In the next page we will have a more detailed discussion about the components used in the Enermax ECO80+ 620 W.

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