This is an excellent power supply! ATX12V v2.31 and EPS 2.92 standards and it is backward compatible with ATX12V 2.2 and ATX12V 2.01 systems. Silent at low to moderate load due to high efficiency and zero RPM fanless mode. Ultra quiet at high loads with 120mm dual-ball bearing fan. 80PLUS Platinum certified, delivering over 92% energy efficiency at real world load conditions. Active Power Factor Correction (PFC) with PF value of 0.99. Over-voltage and over-current protection, under-voltage protection, and short circuit protection provide maximum safety to your critical system components. Universal AC input from 90264V. MTBF hours:100,000 hours.