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Corsair RM550x 2021 550W 80 PLUS Gold Fully Modular ATX Power Supply
Corsair

Corsair RM550x

Power SuppliesView on corsair.com
Wattage:
550 W
80 PLUS Rating:
Gold
Modularity:
Fully Modular
ATX Standard:
ATX 2.x

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Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.

Manufacturer: Corsair Last updated: 2026-09-15

Where to buy

Corsair RM550x (2021) (550W/80+ Gold/Fully Modular/ATX 2.x/Compact Mainstream Tier) Review

If you want a 550W 80 PLUS Gold fully modular PSU for a compact mid-range build, the Corsair RM550x (2021) is the smaller sibling in the RMx lineup.

We'd suggest it for a mainstream single-GPU build (RTX 4060/4060 Ti class) where 550W is plenty and you'd rather have Corsair's quieter magnetic-levitation fan than shave a few dollars off a Bronze unit.

Where 550W Fits

550W is enough for most non-flagship single-GPU systems, and the magnetic levitation fan bearing runs quieter than the sleeve-bearing fans found in cheaper 80+ Gold units at this wattage.

Specifications

Identity

BrandCorsair
Model NumberRM550x (2021)

Output and rails

+12V Rail Amperage45.8 A
Single +12V RailYes

Connector inventory

SATA Connectors7

Form factor and fit

Length160 mm
ColourBlack

Cooling

Fan BearingMagnetic Levitation

Build quality

MTBF100000 hours

Cables

ModularityFully Modular

Monitoring, protection and price

ProtectionsOVP, UVP, SCP, OTP, OPP
Warranty10 years
Wattage550 W
80 PLUS RatingGold
ATX StandardATX 2.x
Form FactorATX
Zero-RPM ModeYes
Fan Size135 mm
Fan Model / BearingMagnetic Levitation Bearing
Japanese CapacitorsYes
Source URLhttps://www.corsair.com/us/en/p/psu/cp-9020197-na/rmx-series-rm550x-550-watt-80-plus-gold-fully-modular-atx-psu-cp-9020197-na

Expert Review

Reviewed by Burooj Alam. Rated by us, not by users.

Best for

  • RTX 4060/4060 Ti or RX 7600-class single-GPU builds
  • Buyers who want Gold efficiency without paying for excess wattage
  • Quiet, compact mid-tower builds

Not for

  • High-end GPU or multi-GPU systems
  • Anyone needing native 12V-2x6/ATX 3.0
  • Future-proofing for a GPU upgrade beyond 550W

FAQs

What are the key specifications of the Corsair RM550x (2021) (550W/80+ Gold/Fully Modular/ATX 2.x/Compact Mainstream Tier)?

The Corsair RM550x (2021) (550W/80+ Gold/Fully Modular/ATX 2.x/Compact Mainstream Tier) is a power supply from Corsair. Key specs: Wattage 550, 80 PLUS Rating Gold, Modularity Fully Modular, ATX Standard ATX 2.x, Fan Size 135.

Will the Corsair RM550x (2021) (550W/80+ Gold/Fully Modular/ATX 2.x/Compact Mainstream Tier) work with my current setup?

The Corsair RM550x (2021) (550W/80+ Gold/Fully Modular/ATX 2.x/Compact Mainstream Tier) lists Wattage is 550. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.

Who is the Corsair RM550x (2021) (550W/80+ Gold/Fully Modular/ATX 2.x/Compact Mainstream Tier) best suited to?

It suits rtx 4060/4060 ti or rx 7600-class single-gpu builds, buyers who want gold efficiency without paying for excess wattage, quiet, compact mid-tower builds.

What are the drawbacks of the Corsair RM550x (2021) (550W/80+ Gold/Fully Modular/ATX 2.x/Compact Mainstream Tier)?

It is a poor fit for high-end gpu or multi-gpu systems, anyone needing native 12v-2x6/atx 3.0, future-proofing for a gpu upgrade beyond 550w.

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