Articles: Cases/PSU

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Testing Participants

Cooler Master Silent Pro Gold 600W

We were not at all impressed with the Cooler Master PSUs we tested in our recent roundup but those were cheaper products. The Gold-certified model is different, its higher status evident even in its packaging.

The Silent Pro Gold comes in a large black-and-gold box that lacks a carry handle.

Product features and electrical parameters are listed on the back of the box. By the way, each model in the Silent Pro Gold series, which ranges from 600 to 1200 watts, has individual packaging.

Besides the PSU, the box contains a mains cord, fasteners, a neat envelope with a user manual and warranty card, and a cute pouch for detachable cables. Everything is designed in a consistent black-and-gold style.

Exterior Design

The PSU itself follows the overall design concept. It’s got a black case with some elements that try hard, perhaps not very successfully, to look golden.

The back panel is mostly a large honeycomb vent grid embellished with a Cooler Master logo.

The Silent Pro Gold features modular design. Its power cables are all detachable, except for the indispensable mainboard and CPU ones.

There are no additional vent holes in the PSU case.

Circuit Design

The familiar shape of the fingered heatsinks makes it easy to identify the real maker of this PSU. Like the lackluster Cooler Master GX 750W, this product is based on an Enhance platform.

It boasts every accomplishment of a top-class PSU: dedicated voltage regulation based on DC-DC converters, active power factor correction, and multistep output voltage filtering.

The daughter cards with DC-DC converters are placed crosswise between the output circuitry and the mains connector.

The voltage converters are based on a PWM controller APW7073 which also protects the PSUs against overvoltage and undervoltage.

You can see smoothing capacitors on the card with the connectors for modular cables. There are high-quality electrolytic capacitors from United Chemi-Con’s KY and KZE series at the PSU’s output.

Cables and Connectors

The Silent Pro Gold 600W has the following cables and connectors:

  • One mainboard cable with a 20+4-pin connector (51 cm)
  • One CPU cable with a 4+4-pin connector (62 cm)
  • Two connectors for graphics card cables
  • Five connectors for peripheral power cables

Included with the PSU are:

  • Two graphics card cable with one 6+2-pin and one 6-pin connector on each (60+10 cm)
  • One cable with two PATA power connectors and one floppy-drive plug (45+10+10 cm)
  • One cable with two PATA power connectors (45+10 cm)
  • Three cables with three SATA power connectors on each (50+10+10 cm)

Perhaps the connectors are placed too close to each other on the detachable cables, but the latter are flexible enough to make up for this shortcoming. When an ordinary cable would be too stiff to take the required shape, a Cooler Master cable can do the job easily.


The product specifications are up to today’s requirements, too. The Silent Pro Gold 600W can provide up to 576 out of its total 600 watts via the +12V rail.

The +12V voltage is implemented as a single power rail, so you don’t have to worry about overloading a particular “virtual” output line of a modest load capacity.

The combined load capacity of the +3.3 and +5V rails is expectedly very high. The PSU can deliver up to 150 watts (up to 25 amperes per each) across them, although today’s computers rarely need more than 50 watts.

UPS Compatibility

Connected to our APC SmartUPS SC 620, this PSU was stable at loads up to 410 watts when powered by the mains but could only switch to the UPS’s batteries at a load of 280 watts.

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