The first custom AMD Radeon RX 480 has been spotted, with the SAPPHIRE Radeon RX 480 Nitro 8GB making an appearance in leaked shots (KOSDAQ:123260, NYSE:AMD) The first pictures of a custom AMD Radeon RX 480 have arrived, with the SAPPHIRE Radeon RX 480 Nitro 8GB making an appearance, rocking a new silver cooled shroud…