About This Item Antec Csk850 Pro Atx3.1 Atx 3.1 & Pcie 5.1 Compatibility: Supports The Latest Gpus, Including Nvidia Geforce Rtx 40 Series, With 12V-2X6 Gpu Cable. 850W 80 Plus Bronze Certified: Up To 90% Efficiency For A Cooler, Quieter System With 850W