So what about this http://amzn.to/2aaEO3t - 400w this is all you need for any of those cards... You can buy more, but you're just wasting money... It has the PCI-E power connectors you'll need for any graphics card. http://amzn.to/2a1HXD0 - $130 right now for an open box GTX 950, that card is at least 50% faster than the GTX 750 TI ??
Yeah I don't know why this PSU is kind a cheaper, but what PSU would you recommend?