The G12 GC Series is available in the standard ATX Form Factor and in wattages that are most common for a PC system. The Seasonic G12 GC-Series achieves 80 PLUS Gold standard of providing at least 87 , 90 and 87 power usage efficiency at 20 , 50 and 100 operating loads, respectively. This efficiency, combined with Active Power Factor Correction, enables the G12 GC series power supplies to lessen energy waste, which translates into savings on the costs of energy costs for its users. In addition to being greatly efficient, the G12 GC units utilize the LLC resonant converter design, and the industry’s leading Smart and Silent Fan Control (S2FC). At-a-glance 80 PLUS Gold certified Fixed cables S2FC - Smart and Silent Fan Control Tight Voltage Regulation Reasons to buy 80 PLUS Gold certified Fixed cables S2FC - Smart and Silent Fan Control Tight Voltage Regulation Specification Technical Description: Seasonic G12-GC-550 Design Fan diameter:12 cm Product colour:Black Operational conditions Operating temperature (T-T):0 - 50 °C Performance Certification:Energy Star, RoHS, WEEE, ErP Lot 6, REACH Safety:cTUVus, TUV, CB, CCC, BSMI, CE, FCC Mean time between failures (MTBF):100000 h Bearing technology:Sleeve Silent mode:Yes Supported motherboard form factors:ATX 80 PLUS certification:80 PLUS Gold Purpose:PC Ports & interfaces PCI Express connector:Yes PCI Express power cable length:70 cm PCI Express power connectors (8-pin):1 PCI Express power connectors (6-pin):1 Peripheral (Molex) power cable length:690 mm Peripheral (Molex) power connectors (4-pin):3 SATA power cable length:690 mm Number of SATA power connectors:6 Power Max output current ( 5Vsb):2.5 A Max output current (-12V):0.3 A Max output current ( 5V):15 A Max output current ( 12V):45 A Max output current ( 3.3V):15 A Combined power ( 5Vsb):12.5 W Combined power (-12V):3.6 W Combined power ( 5V):100 W Combined power ( 12V):540 W Combined power ( 3.3V):100 W Power Factor Correction (PFC) type:Active Input current:10 A AC input frequency:50/60 Hz AC input voltage:100 - 240 V Total power:550 W Weight & dimensions Height:86 mm Width:150 mm