UCP 900W

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The UCP (Ultimate Circuit Protection) series is a new generation of power supplies from Cooler Master designed with quality circuits which specialize in efficiency. With first class soft-start circuits, the lives of the primary circuit components are extended. The continuous active clamp forward switching technology and the D/D VRMs circuit design achieves over 88% efficiency which makes this of the best PSUs in the 80 Plus Silver category. The unique appearance of the UCP is made of a special coating that screams high quality and ruggedness and this is the type of things for high end PCs, especially for Quad SLI setup. Cooler Master also provides an extra-long 5-year warranty with the customer in mind!
  • VRM(Voltage Regulation Module) Circuit offers high efficiency and Power density.
  • Ultra-silent operation with intelligent 120mm fan speed control.
  • Eco-design for energy and money saving by Active PFC.(>0.9) / high efficiency(>88%).
  • Power Failure Indicator will light up if OVP /OCP / OPP / SCP / UVP /OTP occurs.
  • Soft-start circuit A protection mechanism that limits the input inrush current by delaying the actual power-on of the PSU to prevent damage to it.
  • Green mode PFC control circuit by intelligent PWM power conversion.
  • By using a single 12V switching circuit design you get a more efficient AC to DC conversion which leads to an overall more efficient PSU.
  • Compliance with the newest Intel standard ATX 12V V2.3.
  • Compliance with the newest SSI standard EPS 12V V2.92.
  • Five-year warranty.

Model RS900-AAAAA3-US
Type Intel ATX 12V V2.3 / SSI EPS 12V V2.92
Dimension (W / H / D) 150 x190 x 86 (mm)
Input Voltage 90~264V
Input Current [email protected] / [email protected]
Input Frequency Range 47~63Hz
PFC ?0.9
Power Good Signal 100~500ms
Hold Up Time >17ms
Efficiency >88%
MTBF >100,000hrs
Protection OVP / OCP / OPP / SCP / UVP / OTP
Output Capacity 900W
Max. Output Capacity 1080W
Regulatory NEMKO / TUV / CE / GOST / C-tick / UL / FCC
Fan 120mm Fan
Certification SLI / 80 Plus
Connector M/B 24 Pin Connector x 1
CPU 4+4 Pin x 2
PCI-E 8 Pin x2
PCI-E 6 Pin x4
Peripheral x 5
SATA x 9
Floppy x 1
Warranty 5 years
    • Click logo to read full review:
      Hi-techreviews - Editors Choice
      hi-techreviews.com : September 2009

      "The CoolerMaster UCP 900W is a real workhorse and during our testing it never missed a lick. Our test results confirmed our suspicion that this was going to be great PSU and indeed it is. It is capable of handling all of the new video cards and motherboards all at the same time and doing it almost noise free."

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      Pureoverclock.com:  Great Hardware
      Pureoverclock.com : July 2009

      "In the end, the Cooler Master UCP 900W is a very good all-around power supply to satisfy higher-end performance needs; it has sharp aesthetics, great features, excellent performance, and a good price."

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      PCperspective: Silver Award
      pcper.com : February 2009

      "The UCP 900W power supply’s voltage regulation, line regulation and cross-loading regulation are all good. The overall efficiency is excellent and AC ripple noise suppression is good, especially on the +12V outputs.  Under normal operating conditions (below 600W load) the UCP 900W is very quiet. "

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      Techaddicts: Highly Recommended
      techaddicts.net : January 2009

      "This power supply would be ideal for anyone looking to build beefy multi core gaming / workstation system with two or more video cards.  It is SLi Certified for up to two nVidia GeForce 8800 Ultra's, which is great.  I'm sure that this power supply can handle the newer GeForce's in SLi as well.  It also has an abundance of power cables and more than enough PCI-e power connectors for running multiple graphics cards. The fan is also quiet and is great to find in a 900 watt class power supply."

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      rwlabs.com : November 2008

      "Overall the Cooler Master Ultimate Circuit Protection delivers all it promises and does so not only stably but also quietly. The fact that this is the first power supply to achieve the 80 Plus Silver certification is also worth mentioning while the average efficiency of 86,5% leaves little to be desired from a power supply."

      "The UCP 900 from Cooler Master is highly recommended not only because of the impressive top of the line performance but also because of its high construction quality and finish."

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      Tweaknews.net great product
      tweaknews.net : October 2008

      Concerning the 80 PLUS Silver efficiency rating, you should be aware that in order to reach this level, a system would have to have a total draw in the neighborhood of 500 watts which in reality that is a lot of hardware running hard. Then there's the question of value. How high of a premium should a consumer pay for 85% vs. 80% efficiency? I'd say not much. Without mentioning any names, an 80 plus can be had for around $209-219 while the CM, at 85 is $280-300. Unless you'll use the PSU at roughly half its rated capacity, your system (or your electric bill) won't be able to make up for the initial higher price.

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      amdzone.com : September 2008

      Cooler Master have done a great job with the 900 watt UCP and is truly a very efficient PSU. As always though with power supplies as you can see the majority of people don't need that much power and especially a power supply as high-end like this would be best in ultra systems and in workstations and for servers.

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