SeaSonic G12 GM The G12 GM series is available in standard ATX format and in watts, which are most typical of PC system. The Seasonic G12 GM series reaches the 80 PLUS® Gold standard, providing at least 87%, 90% and 87% of energy efficiency at 20%, 50% and 100%, respectively. This efficiency combined with the Active Correction of the Power Factor allows G12 GM series power supplies to reduce energy losses, which translates into saving energy costs for its users. In addition to being very efficient, G12 GM units use the design of the LLC resonance converter and industry-leading intelligent and silent fan control (S2FC). High efficiency and silent fan G12 GC achieves 80 PLUS® Gold certification with 90% efficiency at 50% system load. The intelligent thermal circuit function aims to find the optimal balance between the need to cool components and the need to run the power supply in the quietest possible way.