I purchased a Dell Inspiron 5675 with a Dell labeled AMD RX580 GPU included. The specs on GPU-Z show it as having the same specs and bus speeds as the RX480. On HWINFO64 it shows AMD Radeon RX 580 [DELL], Polaris 10/Ellesmere XT, the Chipset 'AMD Radeon RX 480 Polaris 10/Ellesmere XT. Is Dell pulling a fast one here? How can I identify if this is truly an RX580 card?