GIGABYTE ICE P550SS Silver ATX 3.0 SMPS

The GIGABYTE P550SS ICE (GP-P550SS-ICE) is a 550-watt non-modular ATX power supply finished in white, designed to meet the demands of modern desktop builds that require ATX 3.0 compliance. It carries 80 Plus Silver certification (230V EU), which means it is tested to deliver at least 90% efficiency at 50% load — translating to less wasted energy, lower operating temperatures, and quieter fan behaviour compared to Bronze or unrated units. One of the defining technical features of the P550SS ICE is its full compliance with Intel's ATX 3.0 Power Supply Design Guide (PSDG), and it is also compatible with the newer ATX 3.1 standard. A key requirement of ATX 3.0 is the ability to handle power excursion events — short transient spikes beyond rated wattage — which is essential for systems powered by current-generation discrete graphics cards. The P550SS ICE supports up to 2× total power excursion, handles up to 200% power excursion per the ATX 3.0/3.1 specification, achieves at least 70% efficiency at low load, and meets required power supply timing standards. The unit employs a single +12V rail topology, which consolidates all major power delivery through one high-current rail. This simplifies cable management, improves compatibility across a wide range of components, and makes the PSU a straightforward choice for entry-level or mid-range builds. Cooling is handled by a 120mm Fluid Dynamic Bearing (FDB) fan. FDB technology uses an oil-film shock absorption mechanism that reduces vibration and acoustic output compared to conventional sleeve-bearing fans, and it delivers a significantly extended operational lifespan. The fan operates semi-passively, adjusting speed based on load and internal temperature to keep noise levels low during light-usage scenarios. Cabling follows a flat-cable design that aids airflow management inside the chassis. The connector layout includes 2× PCIe (6+2 pin) connectors — supporting a mid-range discrete GPU — 5× SATA connectors, and 3× peripheral (4-pin Molex) connectors. Protection circuitry covers six categories: 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). GIGABYTE backs the unit with a 3-year warranty (terms may vary by region). Verified Specifications: • Model: GP-P550SS-ICE • Rated Output Power: 550 W • ATX Standard: ATX 3.0 (compatible with ATX 3.1) • 80 Plus Certification: Silver (230V EU) • Fan: 120mm Fluid Dynamic Bearing (FDB) • Rail Configuration: Single +12V • PCIe Connectors (6+2 pin): 2 • SATA Connectors: 5 • Peripheral (4-pin) Connectors: 3 • Cable Type: Flat (non-modular) • Protection: OCP, OTP, OVP, OPP, UVP, SCP • Warranty: 3 years (region-dependent) The P550SS ICE is a practical choice for white-themed ATX mid-tower builds pairing a mid-range CPU and GPU where a reliable, efficiency-certified, ATX 3.0-ready power supply is needed without the added cost of a modular design