Kingwin Stryker 500-Watt ATX 500 Fanless Power Supply STR-500 Fanless 0 dBA Operation Support all intel and AMD Multi-Core CPU and its compatible Motherboards, ATX/BTX compliant Compliance with ATX 12V v2.2, EPS 12V v2.91 and SSI EPS 12V v2.92 Specification Passed 80 PLUS Platinum Certification, on 20% 50% 100% loading, with 90% 92% 89% Efficiency Five years limited warranty Support nVIDIA (SLI)/ATI, high rank & high efficiency graphic card All series are made of RoHS unleaded green material Full Range Design from 100V ~ 250V. (Active PFC)