Set up an external power supply for just a gpu

Ruffneck

Honorable
Nov 24, 2013
5
0
10,510
I am trying to upgrade my dad's desktop. It has pretty decent everything except graphics card. A friend recently gave me two nvidia gtx 460's. I don't want to overwork the current power supply, and I don't seem to have enough slots for all the necessary plugs going into my power supply. Would it be possible to set up a separate power supply just for the graphics card?