A Radeon RX 480 needs 30 amps on the 12v + rail and a 500 watt power supply with 1 - 6+2 pin PCIE power connection.
My current build consists of
Cpu - Amd athlon x4 760k
Gpu - Gtx 750 ti
Psu - cx 430 watt
Hdd- 1 tb wdb
Mobo- msi a78m-e35
case - corsair spec 01
cooler - hyper evo 212 (yes it fits)
I really want the rx 480, how do i make this work without changing psu?