There are prior discussions.

by R. Proffitt Moderator - 3/28/13 3:36 PM

In Reply to: Running GPU under recomended power by firefivestar

Example at http://www.tomshardware.com/forum/367004-33-gt610-graphics-card

But the answer is no. Changing the power supply will not improve the GPU.

Just wondering, why not the slightly better GPU I recommend for such machines? That's the ATI 5450 1GB card.
Bob