GIGABYTE P550SS Power Supply 550W 80 Plus Silver Non-Modular ATX 3.0

The GIGABYTE P550SS Power Supply is a 550W non-modular unit certified with 80 Plus Silver efficiency, designed to deliver stable and reliable power for mid-range gaming and productivity builds. Featuring a single +12V rail, Active PFC above 0.9, and Intel ATX 3.0 compatibility (ATX 3.1 ready), this power supply handles up to 200% power excursion with ease. A 120mm Fluid Dynamic Bearing fan ensures quiet thermal management across sustained loads.

Performance and Efficiency

The GIGABYTE P550SS Power Supply achieves 80 PLUS Silver certification at 230V EU, reaching 70% efficiency even at low loads. The powerful single +12V rail design provides consistent current delivery to demanding CPU and GPU components. With the ability to sustain up to 2x total power excursion, the P550SS handles transient power spikes that modern graphics cards demand.

ATX 3.0 Compatibility

Fully compliant with the Intel PSDG (Power Supply Design Guide) ATX 3.0 standard and compatible with ATX 3.1, the GIGABYTE P550SS Power Supply meets the strictest power supply timing requirements. This forward-compatible design ensures stable operation with the latest generation of components, including PCIe 5.0-ready systems. The power good signal is maintained between 100-150ms for reliable system boot sequences.

Cooling and Design

A 120mm Fluid Dynamic Bearing (FDB) fan provides efficient and quiet cooling throughout operation. The non-modular flat cable design helps streamline cable routing within the chassis, reducing clutter and improving airflow. Measuring 150 x 140 x 86 mm, the compact ATX form factor fits seamlessly into most standard desktop cases.

Protection and Reliability

The GIGABYTE P550SS Power Supply is equipped with six comprehensive protection circuits: OVP (Over Voltage Protection), UVP (Under Voltage Protection), OCP (Over Current Protection), OTP (Over Temperature Protection), OPP (Over Power Protection), and SCP (Short Circuit Protection). With an MTBF exceeding 100,000 hours and Active PFC maintaining a power factor above 0.9, the P550SS ensures long-lasting and stable operation under any system load condition.