GIGABYTE P550B power supply unit 550 W 20+4 pin ATX ATX Black

The power supply is 80 PLUS Bronze certified, delivering up to 85% efficiency at 50% load to reduce energy waste, lower heat generation and decrease fan noise. It uses a single +12V rail for stable power delivery and compatibility with a wide range of PC hardware. The unit features flat cables to reduce clutter inside the case and improve airflow, and a 120mm hydraulic bearing fan with automatic speed control for balanced cooling and quiet operation. Multiple built-in protections and international safety certifications ensure stable and safe system operation.

Advantages

80 PLUS Bronze certification improves energy efficiency and reduces operating temperature. Flat cables simplify cable management and enhance internal airflow. The 120mm hydraulic bearing fan offers quiet operation and longer service life due to its robust bearing design. A single +12V rail provides consistent power output and easier cable connections. Comprehensive protection circuits (OCP, OTP, OVP, OPP, UVP, SCP) increase system reliability.

Key specifications

• Certification: 80 PLUS Bronze (≈85% efficiency at 50% load)
• Fan: 120 mm Silent Hydraulic Bearing (automatic speed control)
• Cables: Flat cable design for improved airflow
• Output topology: Single +12V rail
• Protections: OCP, OTP, OVP, OPP, UVP, SCP
• Designed for compatibility with common PC hardware and overclocking

How to use

Install the power supply into the PC case following the case and PSU mounting guidelines, connect the main 24‑pin ATX and 4/8‑pin CPU power connectors, and attach PCIe, SATA and peripheral connectors as required. Route the flat cables to minimize obstruction to fans and airflow. After connecting components, power on the system and verify stable operation. The fan speed will adjust automatically based on detected power and temperature conditions.

Recommendations

Use this PSU in cases with adequate ventilation and ensure cables are routed to maintain clear airflow paths. Verify that the unit’s wattage meets the total system power requirements, and keep drivers and firmware up to date for overall system stability.