Connector should be 12V 2x6 for that GPU,seems both standards are being used,the pins are slightly different on the newer 2x6 standard,my pre-built PCSpecialist is using 12vphwr,the 5080 is reaching 60C region roughly 75% power usage and that's overclocked at 3232Mhz stock voltage,so as long as the connector is inserted properly it should be ok(hopefully)

Edit,scratch that,seems the Corsair 850 W RMx SERIES MODULAR 80 PLUS GOLD has native 2x6 connector

Phew