The 960 would work. Im sure of it. I know, and maybe you do too, that the CX line is far from a real great brand of PSU, but it will do the 960 as long as the rest of the computer is modest. On the 960 box it even says "400 Watt PSU required." Yes, the 750 Ti uses less power, But you get FAR less performance. Personally I wouldnt invest in a 750, not enough of an upgrade. and no problems!