Can my rog g20bm have rx480 or is it to much power for amd fx770k

Can any one tell me what gpu cards i can upgrade to whit only 180w psu Rog g20bm it is The amd version

Hello Every one i have de amd version ofta this machineI Wonder what graphics card can i runda whit my computaI only have 1 power supply that came whit the computaSo whats vetter card can i Put in