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Corsair RMX Series (2018), RM550x, 550 Watt, 80+ Gold Certified, Fully Modular Power Supply

4.8 4.8 out of 5 stars 12,959 ratings
RM550x
Power Supply
Model Name rmx series
Brand Corsair
Compatible Devices Personal Computer
Output Wattage 550 Watts
Form Factor ATX
Wattage 550 watts
Cooling Method Air
Item dimensions L x W x H 6.3 x 5.91 x 3.39 inches
Item Weight 3.36 Pounds
Power Supply Design Full Modular

About this item

  • 80 Plus Gold certified for lower power consumption, less noise and cooler temperatures
  • Tuned for low noise operation even at full load
  • Zero RPM fan mode for near silent operation at low to medium loads
  • 100 percent industrial grade, 105 degree C rated Japanese capacitors ensure unwavering power and reliability
  • Fully modular cables, so you only connect the cables your system needs

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Corsair RMX Series (2018), RM550x, 550 Watt, 80+ Gold Certified, Fully Modular Power Supply
Corsair RMX Series (2018), RM550x, 550 Watt, 80+ Gold Certified, Fully Modular Power Supply
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Price—-21% $109.99
List: $139.99		-17% $49.99
List: $59.99		$59.99$39.99-18% $139.99
List: $169.99
Delivery—
Get it as soon as Friday, May 17
Get it as soon as Friday, May 17
Get it as soon as Friday, May 17
Get it as soon as Friday, May 17
Get it as soon as Friday, May 17
Customer Ratings
4.84.8 out of 5 stars12,959
4.74.7 out of 5 stars9,795
4.64.6 out of 5 stars961
4.74.7 out of 5 stars852
4.64.6 out of 5 stars5,780
4.74.7 out of 5 stars3,713
Noise level
4.6
4.5
4.5
4.4
4.6
4.5
Easy to install
4.5
4.4
5.0
4.7
4.8
4.6
Energy efficiency
4.6
4.5
4.3
4.3
—
4.6
Value for money
4.2
4.2
4.5
4.4
4.8
—
Quality of material
4.5
4.2
—
—
4.8
4.6
Sold By
—
Amazon.com
Amazon.com
Amazon.com
ARESGAME TECH
Amazon.com
power supply design
Full Modular
Full Modular
Non-Modular
Non-Modular
Non-Modular
Full Modular
connector type
—
EPS
ATX
ATX
ATX
24-pin
form factor
ATX
ATX
ATX
—
ATX
ATX
cooling method
Air
Air
Air
Air
Air
Air
fan count
1
1
1
1
1
1
wattage
550 watts
750 watts
550 watts
550 watts
500 watts
650 watts

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From the manufacturer

RM550x
RM550x
RM550x
RM550x

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Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

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Corsair RMX Series (2018), RM550x, 550 Watt, 80+ Gold Certified, Fully Modular Power Supply

Corsair RMX Series (2018), RM550x, 550 Watt, 80+ Gold Certified, Fully Modular Power Supply

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What's in the box

  • RM550x 80 PLUS Gold Fully Modular ATX Power Supply
  • ATX CABLE 24-PIN (20+4)
  • EPS/ATX12V CABLE 8-PIN (4+4)
  • 2 PCIe CABLE 8-PIN (6+2)
  • 2 SATA CABLE (3 SATA)
  • PERIPHERAL CABLE (4-PIN)
  • FLOPPY DRIVE ADAPTER (4-PIN)

    • Product Description

    Corsair RM550x series power supplies are built with the highest quality components to deliver 80 PLUS Gold efficient power to your PC. Using only Japanese 105 DegreeC capacitors, users can depend on an RM550x PSUs' long life and reliability, backed by a ten-year warranty. Zero RPM Mode means an RM550x series PSU is virtually silent at low and medium loads, and even at maximum power, a low noise fan ensures quiet operation. Fully modular cables make PC builds and upgrades easy, as you only need to install the cables your system requires. Quiet, efficient and dependable, an RM550x PSU has everything you need to power high-performance PC for years to come. Fan bearing technology - Rifle Bearing.

    Product guides and documents

    User Guide (PDF)

    Customer reviews

    4.8 out of 5 stars
    4.8 out of 5
    12,959 global ratings

    Customers say

    Customers like the quality, noise level and power of the system power device. For example, they mention it's reliable, extremely well built and provides ample power to the cpu and gpu. Some appreciate the value, modularity, and design. Opinions are mixed on performance.

    AI-generated from the text of customer reviews

    463 customers mention331 positive132 negative

    Customers like the quality of the power supply. They say it's reliable, well-built, and has an 80+ Gold certification. Customers also say it has no problems handling 750 watts sustained and that the cable management is insane.

    "These power supplies are extremely well-built and come with a 10 year warranty...." Read more

    "...It's quiet, colorful and was highly adaptable." Read more

    "...installation was easy enough, and this PSU has more than enough connections for most applications...." Read more

    "...ports (My board is a ASUS Crosshair X670E) and this PSU does not include the adapter for this plug, Although it's not necessary to power the board...." Read more

    245 customers mention213 positive32 negative

    Customers like the noise level of the system power device. They mention that it's ridiculously quiet, reliable, and stable. Some say that it has no coil whine.

    "...The fan often does not spin at idle and remains extremely quiet even when under near-full load...." Read more

    "...It's quiet, colorful and was highly adaptable." Read more

    "...The thing has been working flawlessly since, and is ridiculously quiet...." Read more

    "...Very reliable, very stable, and barely audible even with your ear near it. I highly recommend Corsair's PSUs." Read more

    179 customers mention154 positive25 negative

    Customers like the power supply. They say it's a great product with plenty of power to spare, and is a good addition to any high energy use PC. Customers also mention that the power is quiet and has 80+ Gold efficiency.

    "...The output is stable with minimal ripple on the 12V rail and acceptable 5V & 3.3V characteristics...." Read more

    "Good power supply that works well with high end components (Ryzen 5950X with a RTX 3080)...." Read more

    "...The power supply itself seems to be fine, hasn't given me any issues, and is quiet, so from that perspective it's good...." Read more

    "...System is working like brand new, and the PSU is still quiet and efficient. Still happy with this purchase." Read more

    157 customers mention141 positive16 negative

    Customers find the installation process of the power supply to be easy. They mention that it has everything they need for proper installation, making it easy to connect and route the cables. They also appreciate the modular design, which makes wire management a breeze. Overall, customers are happy with the ease of installation and say that the product boots up with no issues.

    "...Cables are mostly flexible & easy to route, though the 24-pin ATX connector's capacitors do mildly complicate cable management moreso than with..." Read more

    "...The installation was easy enough, and this PSU has more than enough connections for most applications...." Read more

    "...The PSU doesn't make much noise and was easy to install.My only complaint with this power supply was with the provided power cable...." Read more

    "...Everything runs flawlessly, simple to install with a focus on aesthetics and the cable management is insane - especially with that 5000d case...." Read more

    85 customers mention61 positive24 negative

    Customers like the value of the power supply. They say it's worth the higher price, a great modular PSU for the money, and saves them money over the bronze edition. Customers also mention that Corsair makes the best affordable high quality power supplies out there.

    "...I got this PSU because it was the best balance between quality and price I could find. The RM750x 80+ Gold Certified specifically...." Read more

    "...CONS- The price. It's a really nice price when on sale, but when not on sale, you can find some cheaper alternatives from non name brand..." Read more

    "...It's certainly not the most value option on the market at $120-- other products probably offer the same wattage, features, and durability-- but as..." Read more

    "Great modular PSU for the money, it’s Corsair, they’ve got a good reputation!" Read more

    68 customers mention68 positive0 negative

    Customers appreciate the fully modular design of the power supply. They say it makes for very clean builds and the black cables look great. Customers also like the modular cable design and installation.

    "...Its fully modular, meaning you can only attach the wires you need, which eases the strain of the cable management chaos...." Read more

    "...etc... the modular set up was perfect. I simply plugged one thing back in after the other, then 4 screws to mount the power supply into the case...." Read more

    "...The modularity is great - I have about 1/2 the amount of cables routed through my case now...." Read more

    "...Absolutely love the fully modular version and how I went from having what seemed like a hundred cable leads that I balled up in the bottom of my..." Read more

    64 customers mention64 positive0 negative

    Customers are satisfied with the design of the power supply. They mention that it has a high-end look and feel, and the cable skins are nicely done. They also say that the quality looks good and that it's easy to install. However, some customers have reported issues with the built-in cables.

    "...It's quiet, colorful and was highly adaptable." Read more

    "...Everything runs flawlessly, simple to install with a focus on aesthetics and the cable management is insane - especially with that 5000d case...." Read more

    "Its a great PSU, nice design, doesnt make much noise when the fan activates." Read more

    "...Looks great in all-black PC builds, if visible- Built in cables are well designed - the SATA cables, for example, have multiple connectors on..." Read more

    338 customers mention220 positive118 negative

    Customers are mixed about the performance of the power supply. Some mention that it functions very well, while others say that it stopped working or burned out components. The fan doesn't turn on unless it starts to get hot.

    "...The fan often does not spin at idle and remains extremely quiet even when under near-full load...." Read more

    "...The thing has been working flawlessly since, and is ridiculously quiet...." Read more

    "...There are a lot of reviews stating that the power supply stopped working or burned out components on their motherboard...." Read more

    "Works well" Read more

    good experience, probably not best value though
    4 Stars
    good experience, probably not best value though
    Used for my first PC build almost a year ago and have had no problems. It's certainly not the most value option on the market at $120-- other products probably offer the same wattage, features, and durability-- but as you can tell by the rest of the build, I'm a corsair shill.I realized after the fact that modularity in a power supply isn't really worth it unless you're working with an absolutely tiny case, which the Define Nano S is certainly not. I probably would have gone with a semi modular model in hindsight. In any case, the product comes with a ton of cables, pretty much all of which I will never use.Literally silent-- the fan is supposed to turn on at high loads according to an included fan curve graph, but the only time I've ever seen it spinning is for a few seconds when booting. I have read lots of forum posts online where people think it's broken because it just won't spin under load. Good thing too-- my GPU fan clearance is shockingly tight and it needs all the cool air it can get. I guess demanding games and even 3DMark Time Spy Extreme don't even draw enough watts to warrant active PSU cooling for a casual user like me.
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    Top reviews from the United States

    Trevor Woodard
    5.0 out of 5 stars Excellent Warranty
    Reviewed in the United States on December 8, 2023
    Size: RM850XPattern: Power SupplyVerified Purchase
    These power supplies are extremely well-built and come with a 10 year warranty. The output is stable with minimal ripple on the 12V rail and acceptable 5V & 3.3V characteristics. Efficiency is on the upper end of the 80+ Gold specification, just barely missing 80+ Platinum. The fan often does not spin at idle and remains extremely quiet even when under near-full load. Coil whine has not been a problem, in contrast to older units. Cables are mostly flexible & easy to route, though the 24-pin ATX connector's capacitors do mildly complicate cable management moreso than with other cables, but do further smooth the output.
    Helpful
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    Michael Hillsgrove
    5.0 out of 5 stars It was a learning curve, but once in it was perfect even a year later.
    Reviewed in the United States on April 27, 2024
    Size: RM850XPattern: Power SupplyVerified Purchase
    It was a learning curve, but once in it was perfect even a year later. It's quiet, colorful and was highly adaptable.
    Helpful
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    Nick
    5.0 out of 5 stars High Power Output with Great Value
    Reviewed in the United States on March 23, 2021
    Size: RM750xPattern: Power SupplyVerified Purchase
    I purchased the RM750 after I got a more powerful GPU for my first build. Up until then, I had been using a 600-Watt EVGA non-modular PSU (which was great and had enough power output, but didn't have two PCIe 6+2 connections). Going to a fully modular PSU was quite convenient since I didn't have a load of unused cables hardwired into the old PSU just gunking up the space under the case. The installation was easy enough, and this PSU has more than enough connections for most applications. The thing has been working flawlessly since, and is ridiculously quiet.

    I have friends who have used Corsair PSUs for years and have never experienced a failure or fault, so it's odd that so many here seem to be experiencing such.

    Needless, to say, I fully recommend this product if you want enough power to provide for any gaming build with a good amount of headroom for future hardware that may consume more power.
    Helpful
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    Bryan Chang
    5.0 out of 5 stars Solid, no issues with a standard PC
    Reviewed in the United States on November 28, 2023
    Size: RM750xPattern: Power SupplyVerified Purchase
    Powering a Intel 12th gen system with a Nvidia 4070 4 hard drives with no issues. Very reliable, very stable, and barely audible even with your ear near it. I highly recommend Corsair's PSUs.
    Helpful
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    Freddy
    5.0 out of 5 stars Great Power Supply that does it's job.
    Reviewed in the United States on November 5, 2023
    Size: RM850XPattern: Power SupplyVerified Purchase
    Upgraded from a Cosair RMX 650x due to upgrading to the new Ryzen 7000x and video card upgrades and I've had no issues at all with the power supply.

    Note: Some new Ryzen boards come with a PD_12v_PWR ports (My board is a ASUS Crosshair X670E) and this PSU does not include the adapter for this plug, Although it's not necessary to power the board. The port is used to supply the front panel with 60 watt charging vs 24 watt without it.
    One person found this helpful
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    TL
    5.0 out of 5 stars Works great
    Reviewed in the United States on March 28, 2024
    Size: RM850XPattern: Power SupplyVerified Purchase
    Works well
    Helpful
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    Stan
    4.0 out of 5 stars Good PSU, but odd power cable included
    Reviewed in the United States on May 18, 2021
    Size: RM1000xPattern: Power SupplyVerified Purchase
    Good power supply that works well with high end components (Ryzen 5950X with a RTX 3080). Under load, my power pull hit 750 watts sustained and the PSU had no problems handling it. The PSU doesn't make much noise and was easy to install.

    My only complaint with this power supply was with the provided power cable. Rather than providing a 3 pin grounded power cable, a 2 pin power cable with a grounding wire was provided (picture provided). Not really a problem since I have lots of 3 pin power cables, but why include such a specialized cable that won't work with most household outlets. If someone were to make the mistake of using this cable on a standard household plug and didn't connect the ground wire, it would present a fire hazard. There are a lot of reviews stating that the power supply stopped working or burned out components on their motherboard. I suspect that this may be the reason.
    Customer image
    Stan
    4.0 out of 5 stars Good PSU, but odd power cable included
    Reviewed in the United States on May 18, 2021
    Good power supply that works well with high end components (Ryzen 5950X with a RTX 3080). Under load, my power pull hit 750 watts sustained and the PSU had no problems handling it. The PSU doesn't make much noise and was easy to install.

    My only complaint with this power supply was with the provided power cable. Rather than providing a 3 pin grounded power cable, a 2 pin power cable with a grounding wire was provided (picture provided). Not really a problem since I have lots of 3 pin power cables, but why include such a specialized cable that won't work with most household outlets. If someone were to make the mistake of using this cable on a standard household plug and didn't connect the ground wire, it would present a fire hazard. There are a lot of reviews stating that the power supply stopped working or burned out components on their motherboard. I suspect that this may be the reason.
    Images in this review
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    Customer image
    9 people found this helpful
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    Big Poppa Pump
    5.0 out of 5 stars Corsair quality per usual
    Reviewed in the United States on March 8, 2021
    Size: RM850XPattern: Power SupplyVerified Purchase
    Bought this to replace an old 650x corsair PS I had in my last build for the current rig. That power supply lasted nearly 11 years people! Sure it was older and not modular as that wasn't a thing - but 11 years? My system is centered around corsair from the cpu cooler, ram, fans, pc case, mouse pad and psu. Everything runs flawlessly, simple to install with a focus on aesthetics and the cable management is insane - especially with that 5000d case.

    850x is more than I require, but this is also future proofing as I intend to be using this psu for a decade or so. Its fully modular, meaning you can only attach the wires you need, which eases the strain of the cable management chaos. I have 4 cables attached to power the cpu, gpu, sata sdd backups and of course all the rgb modules on the back panel). Great, quiet and modular psu backed by Corsairs legendary quality.
    5 people found this helpful
    Helpful
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    Top reviews from other countries

    Translate all reviews to English
    Abelardo Ortiz
    5.0 out of 5 stars Joya
    Reviewed in Mexico on October 25, 2023
    Size: RM650xPattern: Power SupplyVerified Purchase
    LLevo con ella 2 años, funcionando sin problema, me siento protegido, actualmente tengo una 3060ti y todo super bien
    Report
    Ariel W
    5.0 out of 5 stars Corsair RM750x 750 Watt 80+ Gold Power Supply - Quiet and Efficient Performance!
    Reviewed in Canada on August 2, 2023
    Size: RM750xPattern: Power SupplyVerified Purchase
    The Corsair RM750x 750 Watt 80+ Gold Power Supply is a top-notch PSU that offers quiet and efficient performance, making it an excellent choice for high-performance systems. With its 80+ Gold certification, fully modular design, and zero RPM fan mode, this power supply delivers reliable and stable power while keeping noise levels to a minimum.

    Pros:
    1. Efficient and Reliable: The 80+ Gold certification ensures high energy efficiency, reducing power wastage and operating costs.

    2. Fully Modular Design: The fully modular cabling system allows for precise cable management, ensuring a clean and clutter-free build.

    3. Silent Operation: The zero RPM fan mode ensures quiet operation during low to moderate system loads, keeping noise levels to a minimum.

    4. Powerful Output: With 750 watts of power, this PSU is capable of handling high-end components and demanding tasks.

    5. Premium Build Quality: Corsair is a trusted brand known for producing high-quality power supplies, ensuring reliability and long-term performance.

    Cons:
    1. None Noted: The Corsair RM750x 750 Watt 80+ Gold Power Supply has met all expectations, and there are no reported drawbacks or issues during use.

    In conclusion, the Corsair RM750x 750 Watt 80+ Gold Power Supply stands out as a top-tier PSU, providing quiet and efficient power delivery for high-performance systems. Its 80+ Gold certification, fully modular design, and zero RPM fan mode make it an ideal choice for users seeking a reliable and silent power solution.

    With no reported drawbacks and widespread user satisfaction, I confidently rate the Corsair RM750x 750 Watt 80+ Gold Power Supply with a perfect five stars. Power your system with confidence using this premium and efficient power supply - an essential component for any PC build or upgrade!
    One person found this helpful
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    Leong T.
    5.0 out of 5 stars Excellent Performance and Silent Operation, with a Minor Initial Odor
    Reviewed in Canada on May 26, 2023
    Size: RM1000xPattern: Power SupplyVerified Purchase
    I had a disappointing experience with my old EVGA 850 power supply, as it suffered from bothersome coil whine under load, resulting in performance issues while gaming, specifically in Elden Ring with my 3080ti. Seeking a solution, I decided to replace it with the Corsair RMx 1KW power supply. The difference was remarkable.

    The RMx 1KW operates silently under any load, delivering power as expected without any performance issues. It even resolved strange OS-level freezes that I was encountering. Corsair's reputation for quality is well-deserved, and my 10-year-old PC still relies on an AX1200 from Corsair, which has been a reliable workhorse.

    The only minor drawback I noticed was a temporary chemical smell during the initial usage period. However, this is expected from a brand new product, and the smell completely dissipated after a couple of days of heavy usage. If you are sensitive to odors, I recommend ensuring good ventilation in the area during the first few days. Nonetheless, this minor inconvenience does not warrant a deduction in my rating.

    Overall, I highly recommend investing in a quality power supply like the Corsair RMx 1KW, as it delivers exceptional performance and operates silently, making it worth the additional cost compared to budget options.
    Report
    Aldo
    5.0 out of 5 stars Recomendada
    Reviewed in Mexico on August 27, 2023
    Size: RM850XPattern: Power SupplyVerified Purchase
    The media could not be loaded.
     Es una fuente bastante silenciosa. Considerando que es uno de los componentes más importantes de la PC, vale la pena invertir en un producto de calidad. A considerar que los cables incluidos son demasiado robustos y rígidos, por lo que son complicados de manejar, recomiendo su instalación en un gabinete amplio. Sobre los cables, incluye bastantes, por lo que la conectividad no será un problema.
    Report
    Esteban
    5.0 out of 5 stars Calidad ante todo
    Reviewed in Mexico on February 26, 2021
    Size: RM750xPattern: Power SupplyVerified Purchase
    Sin duda con una fuente de poder de este calibre no les faltara potencia para un ensamble algo cargado, la fuente es silenciosa y en 2 meses de uso no he tenido ningún problema con ella
    Report