In order to improve gaming (FPS) on my PC I need to upgrade my video card at which point I will need more power as I only have 300W available. My computer is older. ADM athalon Tripple core processor, 8 gig of ram using windows 10. I'm looking at geforce 1050 4 gig card and power supplies on Amazon. Any thoughts if this will be possible? Is the power supply as straight forward as swapping cards? I'm looking to buy a couple more years on this PC and staying under $500 . Thank you.