We think it is simply ridiculous that in this day and age there are still well-known brands labeling power supplies with fake wattages. In the case of the Cooler Master Extreme 2 475 W, we can clearly see that this was done deliberately, as the product box and label list “475” without the letter “W” or the word “Watts” after it, probably to protect themselves in the case of an eventual lawsuit, by claiming that “475” is the “model” of the power supply, not its wattage. However, the manufacturer’s website clearly lists this unit as being a 475 W model. Of course, we are against this kind of practice, and Cooler Master may face problems with agencies in charge of regulating the power supply market around the world.

Even if this unit were labeled with its real wattage (430 W), it would still be a bad choice. Voltages drop below the minimum allowed, and noise and ripple levels can increase above the maximum allowed, causing your computer to behave erratically. Also, this unit presents low efficiency.

There are better power supplies at the same wattage costing less.

In summary, we must recommend that you stay away from this power supply.

Updated 06/28/2012:

Cooler Master’s Official Statement

The Extreme 2 series is engineered to be competitive in emerging markets outside of the U.S. where market forces dictate a more aggressive approach. Despite this, Cooler Master includes higher quality capacitors and other critical components. We also make sure that safety regulations such as UL/TUV/ NEMKO/FCC are met and major protections are covered which include: OVP/SCP/OTP/OCP. On top of this, Cooler Master offers a 3-year manufacturer’s warranty.

Safety Regulations

The power supply is required to be tested and to comply with the most current version of the following regulatory specification requirements and/or standards:

Product Safety

  • UL 60950, 3rd Edition – CAN/CSA-C22.2-60950-00
  • TUV / EN 60950, 3rd Edition
  • IEC 60950, 3rd Edition (CB Report to include all national deviations)
  • NEMKO converted from CB
  • CNS13438 (Taiwan/BSMI)

Electromagnetic Compatibility

  • FCC, Class B, Part 15 (Radiated and Conducted Emissions)
  • EN55024 (ITE Specific Immunity)
  • EN55022, 3rd Edition
  • EN 61000-4-2 – Electrostatic Discharge
  • EN 61000-4-3 – Radiated RFI Immunity
  • EN 61000-4-4 – Electrical Fast Transients
  • EN 61000-4-5 – Electrical Surge
  • EN 61000-4-6 – RF Conducted
  • EN 61000-4-8 – Power Frequency Magnetic Fields
  • EN 61000-4-11 – Voltage Dips, Short Interrupts and Fluctuations
  • EN61000-3-3 (Voltage Flicker)
  • EU EMC Directive [(8/9/336/EEC) (CE Compliance)]

Full Major Protections

  • 1. Over Voltage Protection
  • 2. Short Circuit Protection
  • 3. Over Temperature Protection
  • 4. Over Current Protection
Gabriel Torres is a Brazilian best-selling ICT expert, with 24 books published. He started his online career in 1996, when he launched Clube do Hardware, which is one of the oldest and largest websites about technology in Brazil. He created Hardware Secrets in 1999 to expand his knowledge outside his home country.