Reviews and Problems with Cooler Master Extreme Power Plus 550W (RS-550-PCAR-E3)
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Cooler Master eXtreme Power Plus 550 W Power Supply Review
8 April 2010
Summary: Although some can see Cooler Master eXtreme Power Plus 550 W as an option if you are not going to pull 550 W from it, we can't recommend this unit, as it burns if you try to pull its rated wattage. Its main technical problem is efficiency, between 73.2% and 77.5%, which would prevent us from recommending this unit even if it could deliver its labeled power.
But there is another problem: pricing. Costing USD 65 it is simply too expensive for what it is.
Excerpt: The Cooler Master eXtreme Power Plus 550W ($64.99 list) is a 550-watt power supply designed for use with desktop computers. This ATX12V V2.3 power supply uses two +12V rails and sports a 20+4–pin main power connector, two 6+2–pin PCI Express power connectors, six SATA power connectors, and three four-pin Molex power connectors. It is certified for use with either AMD's CrossFireX or Nvidia's SLI multiple–video card technologies.
Conclusion: Looking at the results from our tests we can see that the PSU is really stable for its price range. Usually you tend to get inferior quality units for the prices I have seen this selling for. The biggest flaw with this PSU is actually the noise it makes, it is alot louder than most psu´s I have tested during the years but maybe it will work good with the Coolermaster Sileo 500 case that we are going to review later, since they are packaged together.