Corsair

Corsair CX-M Series, CX550M, Modular Power Supply, 80 Plus Bronze

Name: Corsair CX-M Series, CX550M, Modular Power Supply, 80 Plus Bronze
Brand: Corsair
SKU: B093NVY3TY

4.6(2.3K+ reviews, all variants)

unknownPrice range unavailable

#7 in Computer Power Supplies

modular

Modular

wattage

550 watts

fan size

140mm

connector

PCI Express

compatible

Personal Computer

form factor

ATX

cooling method

Air

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AI Verdict

A 550-watt, 80 Plus Bronze, semi-modular ATX power supply for budget to mid-range PC builds needing clean power delivery.

Situational Fit

This 550-watt, 80 Plus Bronze, semi-modular power supply is a solid choice for specific mid-range PC builds. Its 140mm length and semi-modular cables help with space and tidiness in cases where full modularity isn't a strict requirement.

If you're planning a high-end build or extensive overclocking, look for PSUs with higher wattage, 80 Plus Gold or Platinum efficiency, and fully modular cabling.

Regret Score™

Medium Risk

Lower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity

29/100

vs. 1,285 Power & Cooling we've analyzedSafer than 39%

Hidden Defects

16/35

Issues discovered after purchase

Achilles' Heel

0/25

Critically weak dimension

Expectation Gap

6/20

Amazon rating vs actual quality

Fit Risk

7/20

Chance this product isn't for you

BuyChoice Score

3.5

Pros

Semi-modular cabling allows connecting only the necessary cables for a cleaner build.
Japanese capacitors rated up to 105°C deliver consistent and reliable power.
A rifle bearing fan contributes to low-noise operation.
Robust DC-DC conversion provides clean, consistent power to +3.3V and +5V components.
The unit is only 140mm long, offering flexibility in build configurations.
Comes with a five-year warranty.

Cons

80 PLUS Bronze certification is not the highest efficiency tier available.
Only semi-modular, meaning some cables are permanently attached, limiting ultimate cable management.
The unit offers basic protection features, including OPP, SCP, UVP, and OVP.
Not recommended for high-end systems or configurations with multiple GPUs.

Dimension Scores

Efficiency & Output6/10

The 80 PLUS Bronze certification guarantees at least 82% efficiency at 100% load, which is average for its category but not top-tier.

Noise Level7/10

It uses a rifle bearing fan for low-noise operation, with the fan spinning slowly up to approximately 400W load.

Build Quality7/10

Features Japanese capacitors rated to 105°C and robust DC-DC conversion for consistent power delivery.

Cable Management6/10

Semi-modular cabling allows users to connect only the necessary cables, improving tidiness over non-modular units.

Best For

Budget to mid-range gaming PC builds, like those with a Ryzen 5 3600 and a GTX 1660 Super or RX 5700 XT.
Upgrading power supplies in older pre-built desktop systems.
PC builders prioritizing basic cable management without the cost of full modularity.

Not Recommended For

High-end PC builds with multiple graphics cards or extreme overclocking.
Users requiring absolute silence, as the fan spins up at loads over 400W.

Watch Out For

Older 'green label' CXM models were reportedly loud, causing confusion with the quieter 'grey label' version.
While sufficient for many setups, it's not designed for Crossfire or SLI multi-GPU configurations.
Some users report that for builds exceeding $1200, a higher-tier PSU like Corsair's RMx line is a better investment for power delivery and warranty.

Full Specifications

ASIN	B093NVY3TY
Brand	Corsair
Series	CX550M
Wattage	550 watts
Model Name	CX550M
Form Factor	ATX
Item Weight	3.3 pounds
Manufacturer	Corsair
Connector Type	PCI Express
Cooling Method	Air
Output Wattage	550 Watts
Item model number	CP-9020220-NA
Compatible Devices	Personal Computer
Product Dimensions	5.51 x 5.91 x 3.39 inches
Item Dimensions LxWxH	5.51 x 5.91 x 3.39 inches
Item dimensions L x W x H	5.51 x 5.91 x 3.39 inches

What Buyers Say

Many users are happy with the CX550M for its ability to power mid-range gaming systems without issues, often citing its semi-modular design as a key benefit for tidier builds. There's a recurring theme of distinguishing the newer, quieter 'grey label' models from older, louder 'green label' versions, with the current ASIN being the preferred 'grey label' unit. It's frequently chosen for its value proposition in budget-conscious builds.

“Needed a new PSU for my Ryzen 5 3600 and 2070 Super, this thing just works, cables were easy enough to manage, and it's not loud like my old one. Totally worth it for the price, my PC finally feels stable!”

Common Praise

Semi-modular cables make for a much cleaner PC interior.
Works perfectly with mid-range CPU/GPU combinations like a Ryzen 3600 and a 2070 Super.
Considered a good value for the price, especially for system upgrades or new builds under $1200.
Easy to install, even for users replacing a failed power supply.

Common Complaints

Confusion between the current 'grey label' version and older, louder 'green label' CXM power supplies.
Not suitable for high-end systems or those planning to run multiple graphics cards.
Some users would prefer fully modular cabling for maximum flexibility.
The 80 Plus Bronze efficiency is not as high as Gold or Platinum rated units.

Ownership Tips

Make sure you're getting the 'grey label' version; it's the newer, quieter model.
It's a popular choice for first-time builders and budget-conscious upgrades.
The semi-modular design really helps with airflow and aesthetics, even if it's not fully modular.
It can handle a decent amount of power for a single mid-range GPU without breaking a sweat.

Frequently Asked Questions

Is the Corsair CX550M loud?

The current 'grey label' version of the CX550M, which this ASIN represents, features a rifle bearing fan designed for low-noise operation. The fan spins slowly up to around 400W, after which its speed increases. Older 'green label' models were known to be louder.

Is this power supply fully modular?

No, the Corsair CX550M is a semi-modular power supply. This means some essential cables, like the 24-pin ATX and 8-pin EPS12V, are permanently attached, while others can be connected as needed.

What kind of PC builds is 550W suitable for?

A 550-watt power supply like the CX550M is suitable for budget to mid-range gaming PCs, often paired with CPUs like a Ryzen 5 3600 and GPUs such as a GTX 1660 Super, RX 5700 XT, or even a 2070 Super.

What is the warranty period for this power supply?

The Corsair CX550M comes with a five-year warranty.

What does '80 Plus Bronze' mean?

80 Plus Bronze is an efficiency certification indicating that the power supply is at least 82% efficient at 20% load, 85% efficient at 50% load, and 82% efficient at 100% load. This means less power is wasted as heat compared to non-certified units.

Buying Guide

When you're picking a power supply, you're essentially choosing the heart of your PC. It converts wall power into the specific voltages your components need. Getting the right wattage is crucial; too little, and your system won't run stably; too much, and you're just spending extra money for unused capacity. Efficiency ratings tell you how much power is wasted as heat, impacting your electricity bill and your PC's internal temperature.

Wattage

80 Plus Bronze

Modularity (Semi-Modular)

Fan Size (140mm) and Bearing (Rifle)

Alternatives

If this 550W unit isn't enough, look for power supplies with higher wattage (e.g., 650W or 750W), an 80 Plus Gold or Platinum efficiency rating, and fully modular cabling for maximum flexibility.