Corsair 550 Watt RMx Fully Modular RM550X ATX PSU/Power Supply

550W Corsair RM550x, Full Modular, 80 PLUS Gold, SLI/CrossFire, Single Rail, 45.8A, 135mm Fan, ATX PSU

Scan code: LN67192 Manufacturer code: CP-9020090-UK Request call
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Delivery options £5.48 By DPD On 21st Mar 2018 DPD Delivered to your specified address. Receive SMS with one-hour delivery window. £4.79 Collect from local shops UPS and DPD Pickup Collect your parcel from your newsagents, petrol stations and convenience stores. Free Collect Instore Q-Collect Place your order online and collect from our Bolton store with Q-Collect. Weekend, timed and European delivery options are available at checkout ScanProtect protection ScanProtect Protect against installation damage for 28 days.More
Frequently Bought Together

RM550x - Corsair Power Supply - Fully Modular ATX PSU

Corsair RM550x Power Supply 80PLUS - Gold

Corsair RMx 550W Power Supply

This version of the RMx Series power supplies from corsair comes white a total power output of 550W. The RM550x gives you extremely tight voltage control with near quiet operation. The 80PLUS GOLD rating on this PSU reduces operating costs and excess heat. The Zero RPM fan mode ensures virtual silence at low and medium loads. It also features a fully modular cable set, these DC cables makes building and upgrading your PC easier and leaves it looking great.

View other RMx power outputs:
RM650x - RM750x - RM850x - RM1000x

Fully Modular Connectivity


RMx Fully Modular Cable Design

The fully modular design of the RMx power supply means that during your build you can mount the PSU in the case first and then attatch only the cables you need, making builds and upgrades easy with great looking results.

RM550x Efficiency & Noise Graphs

RM550x Efficiency

Efficiency Graph

RM550x Fan Noise

Noise Graph

Corsair RM550x Output Power Chart

Corsair RM550x Fully Modular Power Supply
AC Input Rating DC Output Rating
AC Input: 100V - 240V DC Output +3.3V +5V +12V -12V +5Vsb
Current: 13A - 6.5A Max Load 25A 25A 45.8A 0.8A 3A
Frequency: 47Hz - 63Hz Maximum Combined Wattage 130W 549.6W 9.6W 15W
  Total Power: 550W

Corsair RM550x Key Features

80PLUS - Gold

80 PLUS Gold CertifiedGold certification ensures high efficiency operation for less excess heat and lower operating costs.

Japanese Capacitors

Japanese 105°C capacitorsPremium internal components ensure solid power delivery and long term reliability.

Zero Fan Mode

Zero RPM Fan ModeFan doesn’t turn on until it’s needed, so you’ll enjoy virtually silent operation at low and medium loads.

10 Year Warranty

Ten Year WarrantyYour guarantee of reliable operation that will last across several system builds.

Size ATX
Edition RM550x
Wattage 550 W
80 PLUS Certification 80 PLUS Gold
Max. Efficiency  
Cooling Fan
Fans 1 x 135mm
Internal +12V Rails Single Rail
Rail 1 +12V 45.8 A
Rail 2 +12V N/A
Rail 3 +12V N/A
Rail 4 +12V N/A
Rail 5 +12V N/A
Rail 6 +12V N/A
Max. Combined Output +12V 45.8 A
Modular Yes
Modularity Full Modular
SLI/CrossFire Yes
EPS 12V Yes
Motherboard Connector 20+4-pin
  • 1 x 4+4-pin CPU +12V (EPS)
  • 4 x 4-pin Molex
  • 2 x 6+2-pin PCIe
  • 1 x FDD Power
  • 6 x SATA
Dimensions 150 x 86 x 160 mm (WxHxD)
Package Type Retail

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

120 months
Return to base
RTB Period:
120 months
Manufacturer Contact Details
0871 472 4747
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550W Corsair RM550x, Full Modular, 80 PLUS Gold, SLI/CrossFire, Single Rail, 45.8A, 135mm Fan, ATX PSU is rated 4.3 out of 5 by 3.
Rated 4 out of 5 by from Quiet, seems reliable, but average cables. Yeah, there's not much to say about it as it seems to work exactly as expected - however the one down side is that the cabling included was pretty limited, with only two 3x SATA cables. Now, I know that there's an image of some cables, but previous Corsair PSUs have had 4x SATA connectors per cable, which would have just about sufficed - though a 3rd cable would have been even better. Okay, so personally I don't go in for windowed casing, so I guess no one's going to know that there's a MOLEX-to-2x SATA adapter other than me, but for the cost of the thing then it's a bit poor in that regard.
Date published: 2017-10-20
Rated 5 out of 5 by from Silent Running I have a PSU that sounded like a jet engine taking off. It was brand new. So my main criteria was a silent PSU. This is silent. The fan does not kick in with my normal use. Only when I am straining the PC does the fan kick in, and even then it is quiet. Being modular it was straight forward to install. The fact that I only use the cables needed means that there is no useless clump of unneeded cables. So better air circulation. Expensive, but worth it.
Date published: 2017-05-30
Rated 4 out of 5 by from Great PSU but at a Cost The RM550x is a great PSU, the build quality is excellent as you would expect from a corsair product and it has been completely silent since using it. I bought this as a PSU for a PC Build for my Son for Xmas I would recommend this if you are building a quality based system that you expect to last a good long while as it is an expensive option. I have it happily running 6 HDD's, 16GB Ram, Skylake I5 and a GTX960 and there is still plenty of room to make system changes without going over the power capabilities such as a more power hungry GPU etc. It doesn't have a large amount of power module slots but that's to be expected for a 550W PSU being modular it does mean that it was easier to cable manage the PSU than one that isn't but it's not really a selling feature as it would be on a larger PSU that you would be adding lots of system options to.
Date published: 2015-12-26
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Questions & Answers

could you tell me the dimensions please

Asked by: MontanaDog
Hello, The dimensions are as follows: 150mm x 86mm x 160mm Regards,
Answered by: LizN
Date published: 2016-05-16
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Corsair 550 Watt RMx Fully Modular RM550X ATX PSU/Power Supply
Corsair 550 Watt RMx Fully Modular RM550X ATX PSU/Power Supply