wut.
You're looking for compatible graphics cards and psus? As far as i'm aware there is no correlation between a graphics card and a power supply, a power supply just depends on how powerful your rig is and Considering your computer looks pretty low end, I don't think you'd need a very big power supply.
My PSU is 430 watts and my specs are:
CPU: AMD FX-6100 3.3Ghz Six-core
RAM: 8GB DDR3 Dual Channel
MotherBoard: Gigabyte GA-970a-D3
Graphics: AMD Radeon HD 7750
Also, if you could wait, I would suggest that you just get a new pc (or build a new one).
EDIT: lel I read it wrong