| Zalman ZM600-HP 600 W Power Supply Review |
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$ Check REAL-TIME pricing for Zalman ZM600-HP 600W Power Supply - ATX Four Independent 12VDC Outputs Ultra Quiet 120mm Fan Dual PCI-E Graphic Card Connectors $ |
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| Transient Filtering Stage |
 As we mentioned on other articles, the first place we like to take a look when opening a power supply to have a hint about its quality is its filtering stage. The recommend 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 Zalman 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.  click to enlarge Figure 12: Transient filtering stage (part 1).
 click to enlarge Figure 13: 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. This section is identical to the one found on OCZ StealthXstream 600 W and GameXstream 700 W. Now let’s have a more detailed discussion on the components used on ZM600-HP. |
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