This product is either discontinued or we cannot get that from suppliers.
Corsair 850w CP-9020188-AU, RM850X White, Fully Modular Power Supply, Continuous output rated temperature C 50°C, MTBF hours 100,000.
CORSAIR RMx White Series fully modular power supplies are built with the highest quality components to deliver 80 PLUS Gold power to your PC, with virtually silent operation.