Gigabyte P550SS 550W 80 Plus Silver ATX Power Supply

The Gigabyte P550SS is a 550-watt ATX power supply designed for mainstream desktop builds that demand reliable, efficient power delivery without compromise. Carrying the 80 Plus Silver certification (230V EU), this unit delivers up to 90% efficiency at 50% load, which translates directly into lower heat output, reduced electricity consumption, and a quieter overall system. Built to the Intel ATX 3.0 standard and compatible with ATX 3.1, the P550SS can sustain power excursions up to 200% of its rated output for short bursts, making it well-suited for systems with modern discrete graphics cards that generate sudden transient spikes. The ATX 3.0 specification also mandates a 70% low-load efficiency threshold and strict power-supply timing compliance, both of which the P550SS meets. Cooling is handled by a 120 mm Fluid Dynamic Bearing (FDB) fan. Unlike conventional sleeve-bearing fans, FDB technology uses an oil-film cushion to reduce friction and vibration, resulting in lower operating noise and a service life that is typically more than twice that of sleeve-bearing alternatives. The fan operates with automatic speed adjustment based on real-time temperature and load sensing, so it stays near-silent during light tasks and ramps up only when necessary. The unit ships in a non-modular flat-cable configuration, with all cables fixed to the PSU for a secure, vibration-resistant connection. The colour is black, and it fits any standard ATX chassis. A comprehensive protection suite safeguards connected components at all times, covering over-current protection (OCP), over-temperature protection (OTP), over-voltage protection (OVP), over-power protection (OPP), under-voltage protection (UVP), and short-circuit protection (SCP). Verifiable specifications: • Wattage: 550 W • Efficiency certification: 80 Plus Silver (230V EU) • Form factor: ATX • ATX standard: ATX 3.0 (ATX 3.1 compatible) • Fan: 120 mm Fluid Dynamic Bearing (FDB) • Modular: Non-modular • PCIe connectors: 2 × (6+2)-pin • SATA connectors: 5 • Peripheral (4-pin Molex): 3 • Colour: Black • Warranty: 3 years • GTIN: 4719331554187 • SKU: GP-P550SS Pair the P550SS with a compatible Gigabyte motherboard such as the B650M Aorus Elite AX or the B850M Eagle WiFi6E for a fully validated Gigabyte platform, or combine it with a mid-range GPU like the Gigabyte RTX 5060 Ti Eagle OC for a balanced gaming or productivity build