what wattage do you need, how many power cables going into the graphics card and what type etc
The psu in your pc will need to be supplying between 450 and 500 watts.
400-500 watts will be fine. I ran mine on a 430 watt antec for about 18 months just fine. FYI - it did run fine on a generic 350 watt PSU for a couple weeks also. You will be fine with 34 amps or more on your 12 volt rail(s). You need 1, 6-pin, PCI-E power cable, or an adapter that comes with most cards to convert 2, 4-pin cables to 1, 6-pin cable.
