Yep. Constant beeping is the signal to check out your RAM. Most likley it's not fully seated. If they ARE fully in (you can't see more than a hairline of the teeth) then it's possible they're in the wrong slots. Lastly, it's possible you have bad RAM. Worst case, the mobo's bad.
Oh, and just for your reference, there's a lot of errors that you'll only get a beep for and nothing will come up on the screen. They're called "beep codes," and are a way the mobo manufacturers designed a way for the mobo to tell you what the problem is even when it can't get to the monitor yet. Your mobo manual should have a listing of the beep codes that you can listen for and interpret.