Corsair RM850x SHIFT Fully Modular ATX Power Supply 80 PLUS Gold ATX – Black. Brand New / Sealed / Unused. Complete in Original package. Items are eligible for return within 30 days of receipt. The serial numbers for each item are recorded in the database. If these conditions are not met, a deduction may be applied to compensate for the items diminished value. Unpaid auctions will be automatically canceled after this period.