what do i use to conect my graphcs card

dottorrent

Honorable
I would definitely change that awful PSU now. That I wouldn't even put in a scrap salvaged PC. If you want a good PSU that can run your card no problem and won't create a fire, I recommend this PSU -

Antec Earthwatts 380w 80+ Bronze certified PSU - http://www.ebuyer.com/185183-antec-380w-earthwatts-green-psu-ea-380d-green]

And to answer your question, yes. Just plug it in the PCI-e 16X slot, the lane at the top. Wear an anti-static wrist band while doing so, or you risk destroying your computer and / or your components.