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Cougar PowerX 550 W Power Supply Unit Review
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COUGAR Power Supplies

COUGAR was established in 2007 by a group of PC hardware enthusiasts in Germany, who wanted more than the typical PC cases and PSUs that had the same boring looks for umpteen years and internal layouts with endlessly uncreative cosmetic variations and poor quality. So COUGAR was formed to provide gamers more stylish product concepts with the strictest quality requirements. Today, COUGAR is a global brand manufacturer that focuses on high-quality PC cases and PSUs.

COUGAR offers an extensive array of PC power supplies, divided into 4 categories according to their 80 PLUS ratings :

  • COUGAR 80 PLUS Gold Power Supplies
    - Certified with a minimum efficiency of 87% at light and full loads, and 90% at average load.
  • COUGAR 80 PLUS Bronze Power Supplies
    - Certified with a minimum efficiency of 82% at light and full loads, and 85% at average load.
  • COUGAR 80 PLUS Standard
    - Certified with a minimum efficiency of 80% at all load levels.
  • COUGAR Power Supplies
    - Power efficiency not certified by the 80 PLUS certification program.

Today, we are going to take a look at the COUGAR PowerX 80 PLUS Bronze power supply. It comes in two models - with power outputs of 700 W and 550 W. We will be looking at the 550 W model specifically. Here are its key features :

  • 80 PLUS Bronze certified
    - Up to 87% efficiency

  • Compatible with the latest PC technology
    - Supports the newest ATX12V specifications
    - Created for current and next-generation multi-core CPU platforms

  • Support Multi-GPU technology
    - Support PCI Express 3.0 next generation graphics card with 8 (6+2) pin PCI-E connector

  • Active Power Factor Correction (Active PFC)
    - PF value of up to 99%, provides clean and reliable power

  • Ultra-quiet and temperature-controlled 120 mm fan
    - temperature-controlled design adapts its rotating speed to the PSU temperature. Even at its highest speed, the fan is still quiet enough to be barely noticeable

  • Integrated air inlet design
    - optimal dynamic air inlet design leads to a more silent operation

  • Japanese capacitors
    - Highly-durable Japanese capacitors provide uncompromised performance and reliability

  • 5Vsb OVP design
    - Provides full protection for your USB devices

  • High performance at 40°C
    - Full rated wattage at 40°C / 104°F ambient temperature

  • Dynamic Dual 12V Lines
    - Automatic dynamic load distribution on dual 12V lines to provide power separately to the GPU and the CPU. If you are not using all output lines, the PSU automatically reroutes needed power from unused lines. This improves the performance of the 12V lines considerably for systems with high-end graphics cards in SLI® or CrossFire® mode. and provide high voltage stability to keep components safe.

  • Eco-friendly
    - ErP Lot 6 2013 ready
    - Supports Energy Star 5.0

  • Full protection with OCP, SCP, OVP, UVP, OPP, OTP

Let's find out how well this drive performs!



The COUGAR PowerX 550W power supply came in a compact printed cardboard box. The PowerX PSU's key features are all listed on the top and the front lid, with its specifications listed at the bottom. When you open it up, you will find the PSU inside a bubble wrap sleeve with the cables on the side.

When you take everything out, this is what you should find :

  • One 550W COUGAR PowerX PSU with cables
  • One power cable
  • Five cable ties with five screws
  • One installation manual

Let's take a closer look...


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COUGAR PowerX 550W PSU Review


COUGAR Power Supplies, Packaging


The COUGAR PowerX 550W PSU


Size Comparison, Cables & Connectors


80 PLUS Bronze Certification
Power Output Distribution
Safety Features


Overall Voltage Characteristics
Voltages Under Load



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