Articles: Cases/PSU

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Cougar GX G900 and Cougar GX G1050

We’ve recently tested one Cougar, the retail brand of HEC/Compucase Group. With a higher wattage rating, that model was only compliant with the 80 PLUS Bronze standard.

The packaging of the GX series models is designed in the same style with but minor discrepancies.

Below the cover, the box is divided into four compartments: for the PSU, fixed cables, modular cables and accessories (fasteners, mains cord, a user manual and cable straps).

Exterior Design

The Cougar GX series look similar to the abovementioned CMX 1200 model.

The only difference is about the color scheme. Instead of the daring mix of red and black for the CMX series, the Gold-certified GX series is painted a calmer combination of black and gold.

You can learn the name and wattage of the particular model easily as they are indicated on the case with shiny letters.

Circuit Design

Besides looking similar to the CMX model, the GX series are alike to it inside. The component layout of the Gold-certified units is identical to that of the Bronze model except for the heatsinks, which are unusually large for such high-efficiency PSUs and have obviously been borrowed from the lower-efficiency predecessor.

The Cougar GX series features dedicated voltage regulation based on DC-DC converters, active PFC and dual-transformer design.

We could only find one difference from the Bronze-certified Cougar. The Gold-certified GX series have a lot of solid-state capacitors in the output circuitry whereas their less efficient cousin mostly employs electrolytic capacitors.

The direct current converters can also be seen here as two small upright cards. They differ from each other in their PCB design and component layout. It’s unusual as most of PSUs we’ve tested so far had identical converters for both +5V and +3.3V voltage.

Smoothing chokes and solid-state capacitors can be found on the reverse side of the converter cards.

The brands of the electrolytic capacitors haven’t changed since the CMX series: Panasonic at the input and Teapo at the output. Every capacitor is rated for an operating temperature of 105°C.

Cables and Connectors

The Cougar GX G900 model has the following cables and connectors:

  • One mainboard cable with a 20+4-pin connector (62 cm)
  • One CPU cable with 8-pin, 4+4-pin and 4-pin connectors (62+30+30 cm)
  • One graphics card cable with a 6+2-pin connector (53 cm)
  • One graphics card cable with a 6-pin connector (53 cm)
  • Four connectors for graphics card cables
  • Four connectors for peripheral power cables

Included with the PSU are:

  • Three graphics card cables with a 6+2-pin connector (50 cm)
  • One graphics card cable with a 6-pin connector (50 cm)
  • One cable with four PATA power connectors (50+15+15+15 cm)
  • One cable with three SATA and two PATA power connectors (50+15+15+15+15 cm)
  • One cable with four SATA and one PATA power connector (50+15+15+15+15 cm)
  • One cable with four SATA power connectors (50+15+15+15 cm)
  • One adapter from a PATA power connector to a floppy-drive plug (15 cm)

The higher-wattage model has 6+2-pin rather than 6-pin connectors on the graphics card cables and adds a fifth SATA connector to the single SATA-only power cable.

Overall, we’ve got a sufficient number of cables and connectors here but the CPU power cable doesn’t make sense. It’s unclear why anyone would ever need a CPU cable with a total length of over 120 centimeters and two extra connectors (the 8-pin and the 4-pin ones) which are duplicated by the third 4+4-pin connector. A single 4+4-pin connector on a 70cm cable would be just fine.


The two models are similar in their specifications. They only differ in the load capacity of the +12V rail and the combined load on the +3.3V and +5V rails (but the peak current on each of these rails is the same with both PSU models).

The load capacity of the +12V rail is close to the full output power of each PSU. The small difference is going to be easily accounted for by the other power rails.

Each of these Cougar PSUs has six “virtual” +12V lines with a max load of 25 amperes. Of course, a single high-capacity line is more flexible and easier to deal with, but the potential downsides of the implemented design are minimized here because the virtual lines are so many.

UPS Compatibility

Connected to our APC SmartUPS SC 620, the Cougar GX G900 was stable at loads up to 375 watts and the GX G1050, up to 382 watts, when powered by the mains. Both units could switch to the UPS’s batteries at loads up to 295 watts.

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