| Kingwin Mach 1 ABT-700MA1S 700 W Power Supply Review |
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Real-time pricing for Kingwin ABT-1220MA1S |
| Kingwin Mach 1 Modular Power Supply - 1220-Watt ATX SLI-Ready Six 12V Rails ABT-1220MA1S |
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| Transient Filtering Stage |
 As we mentioned on other articles and reviews, 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 and the first coil. On this stage this power supply is flawless, providing two extra Y capacitors and one extra X capacitor. Since this power supply does not have active PFC circuit the two MOVs are installed after the rectifying bridge and physically located between the two electrolytic capacitors from voltage doubler, as this is the usual configuration with power supply without active PFC. It also interesting to note that this power supply uses a fuse holder, which is a rarity nowadays.  click to enlarge Figure 9: Transient filtering stage (part 1).
 click to enlarge Figure 10: Transient filtering stage (part 2).
Now let’s have a more detailed discussion on the components used on Mach 1 ABT-700MA1S. |
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