Chieftec CSN-550C power supply unit 550 W 20+4 pin ATX PS/2 Black

The Chieftec CSN-550C 550 W is a fully-modular power supply unit designed for desktop PCs. With a rated total power of 550 W and 80 PLUS Gold certification, the unit provides efficient power delivery across an AC input range of 100–240 V. The PSU uses a 20+4 pin ATX motherboard connector and integrates a single 80 mm cooling fan in a compact black housing with dimensions 125 mm (W) × 100 mm (D) × 64 mm (H), making it suitable for a variety of chassis layouts and mainstream system builds.

Advantages

The Chieftec CSN-550C offers high energy efficiency with its 80 PLUS Gold rating and an efficiency figure of approximately 90%, which helps reduce wasted energy and heat generation. Its fully-modular cabling design simplifies system assembly and cable management by allowing only required cables to be connected. The compact form factor and single 80 mm fan create a small footprint that fits many cases while providing targeted cooling for internal components. The 20+4 pin ATX connector ensures compatibility with standard motherboards.

Suitable for

• Home and office desktop PCs with moderate power requirements
• Mainstream gaming systems without extreme multi-GPU configurations
• Compact or mid-tower cases where space-saving PSUs are preferred
• System builders prioritizing cable management and clean internal layout

Key specifications

• Total power: 550 W
• Efficiency: 90% (typical), 80 PLUS Gold certified
• AC input voltage: 100–240 V
• Motherboard connector: 20+4 pin ATX
• Cooling: one 80 mm fan
• Colour: Black
• Dimensions (W × D × H): 125 mm × 100 mm × 64 mm

How to use

Install the Chieftec CSN-550C in a compatible PC chassis following the case manufacturer’s instructions for PSU orientation and mounting. Connect the 20+4 pin ATX cable to the motherboard and attach only the modular cables required for your system components to minimize clutter. Ensure the AC mains cable is compatible with local outlets and that the AC input is within the specified 100–240 V range. Power on the system and verify stable operation and proper cooling; monitor voltages using motherboard utilities or third-party software if required.

Recommendations

Use the fully-modular design to route cables behind the motherboard tray for improved airflow and tidier builds. Allow for adequate ventilation around the 80 mm fan and avoid restricting intake/exhaust paths. For systems with high continuous power draw or planned upgrades to power-hungry components, consider headroom above the 550 W rating to maintain efficiency and longevity.