Corsair
Corsair CS Series Modular CS550M
Best efficient power supply for quiet, everyday desktop builds.
The Corsair CS Series Modular CS550M is an ideal power supply for basic desktop systems prioritizing low energy consumption, quiet operation, and straightforward installation. It delivers 550 watts of reliable power with an 80 PLUS Gold certification, ensuring excellent energy efficiency. This semi-modular PSU features a 120mm fan with sleeve bearing technology for quiet cooling and supports ATX12V v2.4 and EPS12V 2.92 standards. Its compact dimensions and low-profile black cables make for a clean build. With essential protection features and a 3-year warranty, it offers dependable performance for everyday computing needs.
$99.99
Owner Satisfaction
4.3
/ 5
Category Rank
1023
/ 1256
#1023 in Computer Power Supplies
Price vs Category Average
-88%
Below average
EPS Connector
1
Who it's for
- Budget-conscious builders looking to lower long-term energy costs
- PC enthusiasts prioritizing clean builds and better internal airflow
- System builders seeking peace of mind from a reputable manufacturer
Who should skip it
- Users building in ultra-compact cases needing full cable flexibility
- Power users requiring the latest voltage regulation and efficiency standards
- Long-term owners prioritizing premium components for maximum lifespan
Performance breakdown
Energy Efficiency
80 PLUS Gold certification ensures minimal power waste during daily operation.
Cable Management
Semi-modular design simplifies builds by reducing unnecessary cable clutter.
Acoustic Performance
120mm fan provides quiet, consistent cooling for standard desktop environments.
Build Versatility
Compact ATX form factor fits easily into most standard computer cases.
Reliability Standards
Solid MTBF rating offers dependable longevity for everyday computing tasks.
Connector Availability
Essential connectivity suite covers basic needs but limits multi-GPU expansion.
Key Specs
EPS Connector
1
SATA Connector
6
Fan Bearing Technology
Sleeve
Modern Standby
No
Dimensions
150mm x 86mm x 140mm
Modular
Semi
PSU Compatibility
ATX12V v2.4 and EPS12V 2.92 standards
Cable Type
Low-Profile, All Black
Know before you buy
The Corsair CS550M is a semi-modular power supply. This means the essential cables, like the 24-pin ATX connector, are permanently attached, while the remaining cables are detachable, helping you keep your case clutter-free.
Yes, the CS550M follows the standard ATX form factor with dimensions of 150mm x 86mm x 140mm. It is designed to fit comfortably in most standard desktop cases.
This unit is not designed for multi-GPU setups. It features two PCIe connectors, making it better suited for single-GPU systems or basic desktop builds rather than high-end gaming rigs requiring multiple graphics cards.
The 80 PLUS Gold certification indicates high energy efficiency, meaning the unit wastes less power as heat compared to lower-rated models. This translates to lower electricity consumption and potentially quieter operation under load.
No, the CS550M does not feature a Zero RPM mode. It uses a 120mm sleeve bearing fan that runs continuously to provide consistent cooling for your system.
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$100