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Switching Power Supplies A to Z
Switching Power Supplies A to Z, by Sanjaya Maniktala (Newnes), starting at $94.20
Home » Power
OCZ GameXstream 700 W Power Supply
Author: Gabriel Torres
Type: First Look Last Updated: November 8, 2006
Page: 3 of 8
Real-time pricing for XFX P1-750B-NLG9.
XFX P1-750B-NLG9
Newegg: $129.99 TigerDirect: $129.99
CompUSA: $129.99

Transient Filtering Stage

As we mentioned on other articles, 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 than that, usually removing the MOV, which is essential for cutting spikes coming from the power grid, and the first coil.

Even though this power supply from OCZ has more components than the necessary – one extra X capacitor, two extra Y capacitors, one extra coil and a ferrite bead on the main power cable –, it doesn’t have a MOV, which is a sin for a power supply from this category.

OCZ GameXstream 700 W
click to enlarge
Figure 8: Transient filtering stage (part 1).

OCZ GameXstream 700 W
click to enlarge
Figure 9: Transient filtering stage (part 2).

A very interesting feature from this power supply is that its fuse is inside a fireproof rubber protection. So this protection will prevent the spark produced on the minute the fuse is blown from setting the power supply on fire.

In the next page we will have a more detailed discussion of the components used in the GameXstream 700 W.

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