The Corsair RMx White Series power supplies give robust power delivery, long-term reliability, quiet operation, 80 PLUS Gold-certified efficiency and fully-modular cabling in an all-new white casing.At low and medium loads, the RM850x’s cooling fan provides near-silent operation by not spinning until you need it.Flexible fully-modular, flat white cables mean that you only connect the cables your system needs, making clean and tidy builds easier.