HP 512GB Turbo Drive G2 MLC SSD (923777-001) is a solid-state drive spare part for storage in the HP Elite x2 1012 G2 Tablet. The service guide specifies 512 GB capacity and MLC memory for this exact part number.
The tablet guide lists M.2 2280 SSDs as primary storage and provides removal and replacement instructions for the drive. This makes the part relevant when servicing or replacing storage in the documented tablet configuration.