GPU needs two 6pin power plugs, can i use two on the same cord?

that's a really OLD gpu lol. it might run them on low settings? and with the power supply i believe that is fine, i'm pretty sure some one will chime in and correct me if i'm wrong

but on that video card. try it out, it's free it wont hurt. but prolly save a few penneis and get a gtx 750 or even better the gtx750ti if you can really powerful budget card for a reasonable price.

i dont think i would waste the time purchasing another of the 8800 just to run in SLI. SLI causes driver issues. well not causes per se but can be the source of imcompatibilites and headaches. it's just so much easier to run a faster single card than have the headache of figuring out why your sli solution is malfunctioning. if it happens to malfunction