Evga supernova 850w g2 fully modular power supply features 80 plus gold certified with 90 115vac 92 220vac240vac efficiency or higher under typical loads fully modular to reduce clutter and improve airflow double ball bearing fan for exceptional reliability and quiet operation highest quality japanese brand capacitors ensure long term reliability nvidia sli amp amd crossfire ready heavy duty protections including ovp over voltage protection uvp under voltage protection