As desktop computers continue to advance toward ever more efficient and smaller designs, SilverStone is helping to drive the efficiency movement by releasing the Strider Platinum series of power supplies. Created to be the smallest fully modular ATX power supplies with 80 PLUS Platinum efficiency, they are also incredibly quiet with the ability to run in fanless mode. If the loading condition is below 20%, the fan in the power supply can remain off for silent operation during idle or low powered computing activities. Other great features inherited from previous Strider series include 3% regulation, powerful single +12V rail, 24/7 continuous power output, and multiple PCI-E cables. For those looking to build highly efficient systems in small footprints, the Strider Platinum is definitely the best choice. Features- Compact design with a depth of 140mm for easy integration - High efficiency with 80 PLUS Platinum certification - 100% modular cables - 24/7 continuous power output with 40? operating temperature - Class-leading single +12V rail - Strict 3% voltage regulation and low ripple & noise - Ultra silent 120mm fan with intelligent semi-fanless operation Specification- Model No: SST-ST55F-PT - Max. DC Output: 550W - Power density: 305W per liter - Colour: Black(Lead-Free Paint) - Combined +3.3, +5V: 105W - Combined +12V: 550W - Input Voltage: 90V264V - Input Frequency Range: 47Hz63Hz - PFC: Active PFC(PF>0.9 at full load) - Efficiency: 89%92% at 20%100% loading - MTBF: 100,000 hours - Operating temperature: 0C 40C - Protection: Over current protection, Over power protection, Over voltage protection, Under voltage protection, Over temperature protection, Short circuit protection - Cooling System: Single 120mm silent fan - Noise Level: 0 28 dBA - Dimension: 150 mm (W) x 86 mm (H) x 140 mm (D) - Weight: 2.15 kg - Form factor: ATX - Certification: 80 PLUS Platinum - Other: Compatible with ATX12V v2.4 Connectors- 1 x 24 / 20-Pin motherboard connector(550mm) - 1 x 8 / 4-Pin EPS / ATX 12V connector(750mm) - 2 x 8 / 6-Pin PCIE connector(\"550mm\"x2) - 8 x SATA connector(\"600mm / 150mm / 150mm /150mm\"x2) - 6 x 4-Pin Peripheral connector(\"600mm / 150mm / 150mm\"x2) - 2 x 4-Pin Floppy connector(\"600mm / 150mm / 150mm / 150mm\"x2) - Warranty: 3yr