CORSAIR CSM Series, CS550M, 550 Watt, 80+ Gold Certified, Semi Modular Power Supply The latest ATX12V v2.4 and EPS 2.92 standards and it is backward compatible with ATX12V 2.2, 2.31 and ATX12V 2.01 systems 4th generation Intel Core processor Ready (Intel Haswell and Z87 motherboards) 80PLUS Gold certified, delivering over 92% energy efficiency at real world load conditions The low-profile, flat modular cable design reduces air friction and helps maximize airflow through your computer's chassis A three year warranty and lifetime access to Corsair's legendary technical support and customer service Active Power Factor Correction (PFC) with PF value of 0.99