GX 450W
RS450-ACAAD3-US; RS-450-ACAA-D3 (Discontinued)

Disclaimer: Displayed parts and accessories may not be included in the actual product package.

The hallmark of the GX Series of power supplies is that they feature a single, highly robust 12V rail that efficiently and consistently delivers clean power to all of your critical components such as your processor, drives, RAM, motherboard, and graphics cards.

An included double-layer EMI filter, intelligent 120mm controllable fan, and an active PFC/PWM combo controller all contribute to the overall efficiency of the power supply. All of the many features found within the GX Series contribute to its 80 Plus Certification. This efficiency allows the power supply to utilize most of the power it takes in with minimal waste, saving your electric bill. It makes the GX450W a perfect addition to a home theater PC or mid-range computer setup.


  • Compliance with the latest Intel standard ATX 12V V 2.31.
  • Single +12V rail provides ample power and strong resistance to any overloading.
  • High efficiency design that meets 80 Plus requirements (85% typical).
  • Multiple protection designs (OVP / UVP / OPP / OTP / SCP).
  • High reliability (MTBF>100,000 hours).
  • Double Layer EMI filter reduces Electromagnetic interference.
  • Huge bulk capacitor for hold-up times of >17ms when fully loaded.
  • Efficient transformer that reduces 5Vsb power loss when the system is in an off/sleep state.
  • EuP ready: To save most power consumption (below 0.5W in standby mode).
  • Five-year warranty.

Model RS450-ACAAD3-US; RS-450-ACAA-D3
Type Intel Form Factor ATX 12V V2.31
PFC Active PFC (>0.9)
Input Voltage 90-264Vac (Auto Range)
Input Current 7A @ 115Vac , 3.5A @ 230Vac
Input Frequency Range 47-63Hz
Output Capacity 450W
Max. Output Capacity 540W
Fan 120mm
Power Good Signal 100~500ms
Hold Up Time >17ms
Efficiency 85% typical
MTBF >100,000 hours
Protection OVP / UVP / OPP / OTP / SCP
Dimension 150 x 140 x 86mm
5.9 x 5.5 x 3.4 inch
Operation Temperature 0~40°C (Nominal Input Voltage)
Regulatory CE / FCC / UL / TUV / C-Tick / GOST / BSMI / CCC / KCC
Connector M/B 20 + 4 pins x 1

CPU 4 + 4 pins x 1

PCI-e 6 pins x 1

SATA x 5

Peripheral 4 pins x 3

Floppy 4 pins x 1
Warranty 5 years
UPC Code 884102010491
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    • Click logo to read full review:
      Aphnetworks.com : July 2011

      "Cooler Master states that the GX 450W is the hallmark of the GX series, and one simply cannot disagree. Priced at 49.99 USD at MSRP, the price gives more reason for those that are considering a value power supply to consider this as their next purchase."

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      Xtremetechjunkies.com: Great Award
      Xtremetechjunkies.com : May 2011

      "The Cooler Master GX 450W is a good mainstream powersupply, with high efficiency (between 81.3% and 86.4%), very good voltage regulation, and low noise and ripple levels. At a suggested price of only $50 with stores probably offering less than that the Cooler Master GX 450W is an excellent  inexpensive yet safe power supply with high efficiency."

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      jonnyguru.com : April 2011

      "The GX450 managed its full power rating at the temperature it was supposed to be able to handle, managed decent voltage regulation in the bargain, and should come in to the market at a relatively competitive price."

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      Pureoverclock.com:  Great Value
      Pureoverclock.com : March 2011

      "Pricing is set for about $50 USD for the GX 450W, which is less than we expected when we caught wind of the new unit. This is a very good deal considering what you get here. This power range is loaded with garbage units by questionable companies, but the Cooler Master GX 450W rises above that, offering great value for consumers on a limited budget."

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      Cluboc.net:  4.5 out of 5
      cluboverclocker.com : March 2011

      "I'm very impressed with the GX450.  I honestly didn't think a 450w power supply would power my machine.  It had no problems with my machine, even after some intense Call of Duty: Black Ops battles."

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      Pro-clockers.com:  Best Value
      pro-clockers.com : March 2011

      "We tested the Cooler Master GX 450 with the new Nvidia GTX 550 Ti that is factory overclocked and the power supply meet the challenge and came out on top. If this unit can power the likes of our test bench it can easily conquer HTPC and smaller workstations with no problem."

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      Umlan.com:  9/10
      Umlan.com : March 2011

      "This unit would be perfect for desktop applications or media server as we found no issues with power or performance of this unit. As Cooler Master releases GX 450 in to the wild we also see some of the newest patented features."

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      Hardwaresecrets.com:  Silver
      hardwaresecrets.com : March 2011

      "At a suggested price of only USD 50 – with stores probably offering less than that – the Cooler Master GX 450 W comes with an excellent cost/benefit ratio for users that want an inexpensive yet safe power supply, with high efficiency."

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      Bayreviews.com: Highly Recommended
      Bayreviews.com : March 2011

      "The Cooler Master GX-450W boasts an 85% efficiency rating in a highly functional design that will be at home in almost any desktop computer."

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      Tech-kings.net: Crowned Product Award
      Tech-kings.net : March 2011

      "The GX 450 power supply fills a void in the lower-end market for a gaming-grade, high quality power supply.  This should be perfect for portable gaming systems, lower-end build, as well as HTPCs."

      » Details

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