I bought a RX480 to replace my old HD7850, but the screen stay black when i put the power on.
I have a Z77A-G43 Motherboard with an up to date Bios.
Is the card not compatible?
If you are not getting any display, then it could be a faulty GPU. It should be compatible and i have searched Google and found other users with the same Motherboard using RX 480s.