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COOLER MASTER Real Power Pro 550 RS-550-ACAA-A1 550W ATX12V / EPS12V SLI Certified CrossFire Ready 80 PLUS Certified Active PFC Power Supply

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Marketplace Seller
  • ATX12V / EPS12V
  • 80 PLUS Certified
  • 90 - 264 V 47 - 63 Hz

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Cooler Master's Real Power Pro RS-550-ACAA-A1 PSU is designed with the power user in mind. This 80 Plus certified unit has a rated continuous output capacity of 550W with a max peak output of 660W. Not only is it a SLI certified unit, it is also compliant with ATX 12V v2.3 and EPS 12V v2.91.

The 24-pin motherboard connector is backed up by both a 4-pin and an 8-pin CPU connector. There are 5 Molex and 6 SATA connectors for drives and other peripherals. The 2 PCIe connectors have bead core protection to minimize EMI and electrical noise. A floppy drive connector is included, just in case you need one.

Keeping everything cools is a 120mm fan with an automatic speed control. The back panel is a honeycomb mesh for unrestricted air flow. The combination results in a low noise rating of only 17dBA.

  • newegg ATX12V and EPS12V Compatible Compatible with the ATX12V (ATX v2.3) and EPS12V v2.91 standards, the Cooler Master Real Power Pro 550W provides maximum power stability to drive the latest Intel and AMD processors as well as other components for desktop and server computer systems.
  • newegg 550W Continuous Power A continuous power of 550W delivers safe, reliable output for high-performance gaming computer systems.
  • newegg Highly Efficient Delivering over 80% efficiency, the Cooler Master Real Power Pro 550W power supply saves energy and may even reduce your electric bill!
  • newegg Ultra-silent Cooling Fan The Cooler Master Real Power Pro 550W features a large 120mm fan with intelligent fan speed control for superior cooling and minimized operation noise as low as 17dBA.
  • newegg NVIDIA SLI Certified Featuring two 6-pin PCI-E power connectors, the Cooler Master Real Power Pro 550W power supply has gone through a series of rigorous NVIDIA SLI certification tests for maximum system stability when building NVIDIA SLI PCs.

Learn more about the Cooler Master RS-550-ACAA-A1

Warranty, Returns, And Additional Information
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by Newegg.com's Standard Return Policy.
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Nice PS

Pros: More power than I needed. Wouldn't mind going bigger if you can. This is overall a good power supply though.

Cons: None.

Other Thoughts: recommended.

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Ownership: 1 day to 1 week
Verified Owner
4/ 5

Pros: Tons of power to run SLI,
Long cables to reach,
Stays cool under load.

Cons: Have to put the extra cables somewhere else.

Other Thoughts: ASRock A780GXE/128M
LG Black 6X Blu-ray DVD-ROM
Western Digital VelociRaptor WD3000GLFS 300GB 10000 RPM
AMD Phenom 9950
2 EVGA GeForce 9800 GT Hybrid Power 512MB
COOLER MASTER RC-690

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Good Purchase

Pros: Plenty of cabling options, shielded cables, nice output and very quiet.

Cons: The cables are fairly thick with the shielding, but, that's hardly a con...

Did you find this review helpful?
Ownership: 1 month to 1 year
Verified Owner
4/ 5
Great PSU

Pros: Sleek black design and plenty of connections for your average build. All wires have a nice black mesh sleeve making them look nice and neat. Very quiet and 80+

Cons: Not modular; This is where the "lots of connections" PRO becomes a CON because on your average PC build you use about half of the connections so the other half is bundled up at the top (or in my case at the bottom) of your case creating a big clutter or air-flow hinder

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Great power supply

Pros: Great power supply for a case with a bottom mounted PSU. Stays cool, have yet to feel any heat come from it. Plenty of cables and plenty long enough to reach everything in my case.

Cons: None

Other Thoughts: Gigabyte GA-EP45-DS3R motherboard, Intel Core 2 Quad Q9450 2.6Ghz, OCZ Reaper HPC 4GB (2 x 2GB) DDR2 1066Mhz, BFG GeForce 8800GTS 512MB, Cooler Master RC-690-KKN1-GP case, Real Power Pro 550W PSU

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
quiet, no problems

Pros: Quiet PS, no problems so far, high efficiency. I guess thats about all you can ask for.

Cons: Not the absolute most well-respected PS company, but one of the top ones.

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Nice power supply

Pros: I needed an upgrade for a new video card for my Dell E521. This is a great swap unit. Nice long cables and plenty of them. Swap process took about 5 min. Clearly labeled and individually wrapped wires. Plenty of expansion possible

Cons: none yet

Other Thoughts: If you need to upgarde your Dell look at this one

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Ownership: 1 day to 1 week
Verified Owner
5/ 5
Great quality, Great performance, Great price

Pros: Has all sorts of connectors: ATX12V 4-pin, EPS12V 8-pin, 2x PCIe, 24-pin ATX (not 20+4), 6x SATA, 5x 4-pin Molex, 4-pin Floppy.

Great quality, all wires are plastic sheathed. triple rail 12V @ 19A each. Above all, much cheaper than product of similar quality and performance.

Cons: None

Other Thoughts: Got this in a combo deal, making it as cheap as a competing product with fewer connectors and lower performance. I needed the EPS12V for a certain motherboard, but this PSU has both the 8-pin and 4-pin variants. Beware of Cooler Master's other product line. The Real Power Pro is a high-quality series. The other one is a much cheaper "price-per-watt" series.

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