With price & performance in mind, the EVGA 500B is the best value power supply for your next build on a budget. With 80 Plus Bronze standard, over 80% efficiency under typical loads, the EVGA 500B is a great choice. Combining 500W of continuous power & Single +12V High AMP rail design, gain maximum power & efficiency while staying protected with a series of over volt/over current protections all bundled into one! Features Quiet & Intelligent Auto Fan for near-silent operation 80 PLUS Bronze certified, with 85% efficiency or higher under typical loads Double Ball Bearing Fan Heavy-duty protections, including OVP (Over Voltage Protection), UVP (Under Voltage Protection), OCP (Over Current Protection), OPP (Over Power Protection), SCP (Short Circuit Protection), & OTP (Over Temperature Protection)