computer good enough for Windows Vista?

I'm thinking about buying Windows Vista, but I don't know if my computer can use it. I have heard from other people that your computer needs to be quite new and fast. My computer is two years old, but i have no clue about it.

Is there any testwebsite on the internet that can test it, or can i get a list somewhere out of my computer that shows the specifications?

Tnx for your help! It worked.

Going to get Vista tomorrow