Hydro GSM Lite PRO 550W Features: Compliance with the newest ATX 12V V2.52 Efficiency ≥90% at typical load Intelligent fan speed control Quiet and long-lasting 120mm silent fan Ribbon cables for all enthusiasts Powerful single +12V rail design All japanese electolytic capacitors Intel latest CPU ready Full protections OCP, OVP, SCP, OPP, OTP Specifications: Model HGS-550M Form Factor ATX 80 PLUS Certification Gold Input Voltage 100V-240V Input Current 8-4A Input Frequency 50-60 Hz PFC Active PFC Efficiency ≥90% Fan Type Silent Fan, 120 mm (HYB) Dimensions(L x W x H) 150 x 140 x 86 mm Protection OCP, OVP, SCP, OPP, OTP