Problem with Computer not Posting

TheThexgamer

Commendable
Jan 4, 2017
1
0
1,510
Hey guys!
I was upgrading my GPU and now my PC is not posting any more (not getting any video). All the fans/LEDs are working and the motherboard bug tracking LED notes "A0".I was upgrading to RX 480 from an HD 7770 Ghz edition.The ports of my GPU do not provide any videa,neither do the motherboard video outputs.Any ideas?

My specs:
gigabyte z77x-UD3H
16 GB Ballistic X ram 1600Mhz
i7 3770k
550W PSU
RX 480 Gaming X