geforce 8600gts plugin????

I bought geforce 8600GT today but when I was putting it in I noticed that there is another plugin(zie pic) but I don't have that cable for it in my pc.

do I need to plug it in??
so I need a little help here.

Thats a PCI Express power connector.

You need one from the Power supply.

Most computer shops sell a "converter" plug from the standard molex power plug to PCIe.

But you're probably better off with a new power supply me thinks :D

my pc is new so I think the powersuply Is good but do you mean that ''converter plug'' is a loose cable to connect the graphic card.

EDIT: I managed to get a new powesuply with that cable.
but once I installed the powersuply my pc didn't start and I connected everything so what did I do wrong?

ps. when I start the pc you see the red light just blink 1 time and thats it.

Where did you see the red light? Could you post the Company and model number etc.?

Man this pisses me off, Yesterday I figured out what the problem was, my power supply has 20 pins and my motherboard 24 pins so today I bought a converter once installed it my pc still won't go on. help please!!

What is the model and make of your power supply?