Well, those beeps are a form of diagnostic created by the POST (power on self test). Typically (you did not mention what motherboard you have) three beeps means the motherboard is fried! You can have good ram, and video card, but the board that they all connect to is NO GOOD!
Take out the RAM, and see if you still get three beeps!
It's kind of fun to do the impossible! -Walter Elias Disney