Corsair

Corsair CX550M

Expert rating6.9 / 10

Wattage:: 550 W
80 PLUS Rating:: Bronze
Modularity:: Semi-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: 2026-09-12

Where to buy

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Corsair CX550M Review

Searching for a cheap 550W power supply that isn't a total gamble, the Corsair CX550M is the semi-modular Bronze unit Corsair sells as the budget-friendly step below the RM series.

It's fine for a budget build running a GTX 1660 Super or RX 6600-class card, but we wouldn't push it toward anything hungrier. The fixed 24-pin and EPS cables keep cost down while the PCIe and SATA runs stay modular for easier cable management.

Build and Value

The CX550M uses a CWT single-switch forward-converter platform, which is older tech than the LLC resonant designs in Corsair's RM line, but it's a known-reliable design that keeps the price low for entry-level builds.

Comparison to Alternatives

Next to the Corsair RM750x, the CX550M gives up full modularity, Gold efficiency, and 200W of headroom in exchange for a much lower price point aimed at budget rather than performance builds. Against the EVGA 600 BR, the two sit in the same budget-Bronze tier, but the CX550M's semi-modular PCIe/SATA cables make it slightly easier to route in a compact case.

Our verdict

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

Expert rating6.9 / 10

A safe, unglamorous budget Bronze pick for entry-level gaming PCs that don't need Gold efficiency or full modularity.

Best for

Entry-level gaming builds under $700 total
GTX 1660 Super or RX 6600-class GPUs
Buyers who want modular PCIe/SATA cables without paying RM prices

Not for

High-end GPUs or multi-GPU setups
Anyone wanting a fully modular 24-pin/EPS
Efficiency-focused 24/7 workstation use

Specifications

What these specs mean

Identity

Brand	Corsair
Model Number	CX550M

Output and rails

+12V Rail Amperage	45.8 A
Single +12V Rail	Yes

Standards and compliance

Hold-Up Time	11.1 ms

Efficiency and noise

Measured Avg Efficiency	85.91 %
Measured Average Noise	20.2 dBA

Connector inventory

EPS 8-pin Connectors	1
SATA Connectors	6
Molex Connectors	4

Form factor and fit

Length	140 mm
Colour	Black

Cooling

Fan Bearing	Rifle

Build quality

MTBF	100000 hours

Cables

Modularity	Semi-Modular

Monitoring, protection and price

Protections	OCP, OVP, SCP, OTP
Price	54.99 USD
Warranty	5 years

Wattage	550 W
80 PLUS Rating	Bronze
ATX Standard	ATX 2.x
Form Factor	ATX
Cybenetics Efficiency	Silver
Cybenetics Noise	A
12V-2x6 Connectors	0
Zero-RPM Mode	No
Sleeved Cables	No
PCIe 8-pin Connectors	2
Connector Count	1x 24-pin ATX (fixed), 1x EPS 4+4 (fixed), 2x PCIe 6+2-pin, 6x SATA, 4x Molex
Fan Size	120 mm
Fan Model / Bearing	120mm rifle bearing (HA1225H12F-Z)
OEM / Platform	CWT
Japanese Capacitors	Yes

FAQs

What are the key specifications of the Corsair CX550M (550W/80+ Bronze/Semi-Modular/ATX 2.x/Budget Value Pick)?

Key specs for the Corsair CX550M: Wattage 550 W, Modularity Semi-Modular, Fan Size 120 mm, Warranty 5 years, 80 PLUS Rating Bronze, Cybenetics Efficiency Silver.

Will the Corsair CX550M (550W/80+ Bronze/Semi-Modular/ATX 2.x/Budget Value Pick) work with my current setup?

The Corsair CX550M (550W/80+ Bronze/Semi-Modular/ATX 2.x/Budget Value Pick) lists Wattage is 550 W. 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 CX550M (550W/80+ Bronze/Semi-Modular/ATX 2.x/Budget Value Pick) best suited to?

Best suited to: Entry-level gaming builds under $700 total; GTX 1660 Super or RX 6600-class GPUs; Buyers who want modular PCIe/SATA cables without paying RM prices.

What are the drawbacks of the Corsair CX550M (550W/80+ Bronze/Semi-Modular/ATX 2.x/Budget Value Pick)?

Not the best fit for: High-end GPUs or multi-GPU setups; Anyone wanting a fully modular 24-pin/EPS; Efficiency-focused 24/7 workstation use.