If your monitor has no built in speakers where do you expect to hear the sound from? The crystal in the screen? Your card is probably outputting the sound you just have no way to know without having your sound source hooked up to some speakers.
well i was wanting to hook it up to my surround soud speakers and my card has an dvi svideo an vga inputs.
Have you checked your audio settings in bios to make sure onboard sound is enabled?