What are the beeps like? Consult your motherboard manual and it should tell you what the beeps mean, the beeps can mean that your RAM is not seated properly, or your graphics card is not installed properly. The fan spinning on the graphics card is a good sign and you just have to test if the beeping is cause by the graphics card.
Put the card in, if its beeps, take a note of what the beeps sound like, as in was a few short beeps followed by a long one, just the pattern of it.
Now remove the graphics card and power it up, does the same series of beeps come up? If they do, then some is wrong with your graphics card, if its different, then mostly likely its some other component.