Gigabyte P550SS Silver 550 Watt ATX 3.1 SMPS

The Gigabyte P550SS is a 550-watt ATX 3.1-compliant power supply designed to meet the demands of modern desktop builds, including systems running the latest Intel and AMD platforms. It carries the 80 Plus Silver certification (230V EU), which signifies a minimum efficiency of 90% at 50% load — meaning less energy is lost as heat during typical operation, keeping your chassis cooler and quieter during everyday use and light gaming workloads. One of the defining features of the P550SS is its full compliance with the Intel ATX 3.1 Power Supply Design Guide (PSDG). This standard supports power excursions of up to 200% of rated wattage for short transient spikes, which is particularly relevant when paired with modern discrete graphics cards that can demand sudden bursts of power well above their sustained draw. The unit can sustain up to 2× total power excursion, offers 70% low-load efficiency compliance, and meets the required power supply timing standards outlined in the PSDG specification. Cooling is handled by a 120mm Fluid Dynamic Bearing (FDB) fan. Unlike conventional sleeve-bearing fans, FDB technology uses an oil-film suspension mechanism that reduces physical contact between moving parts. This results in quieter operation, lower vibration, and a significantly extended operational lifespan compared to standard sleeve fans. The fan is also thermally and load-adaptive, automatically modulating its speed based on real-time power draw and internal temperatures. Cable management is simplified through a flat cable design, which reduces internal airflow obstruction and makes routing cleaner inside compact or mid-tower chassis. The unit operates on a single +12V rail architecture, simplifying power delivery to the CPU and GPU. Protection features include OVP (Over-Voltage), OPP (Over-Power), SCP (Short Circuit), UVP (Under-Voltage), OCP (Over-Current), and OTP (Over-Temperature) protection circuits — six layers of safeguarding for connected components. **Verified Specifications:** - Rated Output: 550 Watt - Efficiency Certification: 80 Plus Silver (230V EU) - Standard: Intel ATX 3.1 / PSDG compliant - Fan: 120mm Fluid Dynamic Bearing (FDB) - Rail Architecture: Single +12V - PCIe Connectors (6+2 pin): 2 - SATA Connectors: 5 - Peripheral (4-pin Molex): 3 - Cable Type: Flat (Non-Modular) - Protection: OVP, OPP, SCP, UVP, OCP, OTP - Warranty: 3 Years