from the 120 to the 730. I probably add another $50 to the card and get a gtx 750 instead. They are all use about the same amount of power so no PSU change is needed.
The computer I am using currently using is a bit dated in the department of graphics cards, I'm running a 'NVIDIA GeForce GT 120' however I'd like to install a 'NVIDIA GeForce GT 730'. Would I need to update my power supply as well if I'm generating 450W?
(Also, how would I be sure that the 730 would fit in my current computer?)