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Switching Power Supplies A - Z, Second Edition
Switching Power Supplies A - Z, Second Edition, by Sanjaya Maniktala (Newnes), starting at $48.73
Home » Power
Zalman ZM500-RS Power Supply Review
Author: Gabriel Torres
Type: Reviews Last Updated: December 10, 2009
Page: 1 of 9
Introduction
Hardware Secrets Bronze Award

Zalman has recently released a power supply series based on a resonant switching (RS) design, aptly named RS series. Let’s see if the 500 W model from this series is a good buy.



Like other power supplies from Zalman, ZM500-RS is manufactured by FSP.

Zalman ZM500-RS power supply
click to enlarge
Figure 1: Zalman ZM500-RS power supply.

Zalman ZM500-RS power supply
click to enlarge
Figure 2: Zalman ZM500-RS power supply.

Zalman ZM500-RS is only 5 ½” (140 mm) deep, using a 120 mm fan on its bottom and active PFC circuit, of course.

All cables are protected by nylon sleevings, which come from inside the power supply housing. All cables measure 17 ¾” (45 cm) between the housing and the first connector on the cable, and 5 7/8” (15 cm) between connectors on cables with more than one connector. All wires are 18 AWG, which is the correct gauge to be used.

The cables included are:

  • Main motherboard cable with a 20/24-pin connector.
  • One cable with two ATX12V connectors that together form one EPS12V connector.
  • One auxiliary power cable for video cards with one six/eight-pin connector and one six-pin connector.
  • Two SATA power cables with two SATA power connectors each.
  • One peripheral power cable with two standard peripheral power plugs.
  • One peripheral power cable with two standard peripheral power plugs and one floppy disk drive power connector.

We didn’t like the cable configuration used on ZM500-RS very much. Although it will probably fit the needs of most users looking for a 500 W product, we’d prefer to see the two video card auxiliary power connectors using individual cables instead of being attached to the same cable and one more SATA/peripheral power connector on each cable, for a total of six connectors from each type instead of only four.

Zalman ZM500-RS power supply
click to enlarge
Figure 3: Cables.

Now let’s take an in-depth look inside this power supply.

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