Trouble with Sound in Pinguy 12.04

When I had Windows XP, my built in analog stereo speaker in my tower would blast your eardrums out. When I installed Pinguy, the very best I can get is the tiniest little whisper volume wise. It comes and goes if the sound is set on full blast. I have no idea what the problem is or how to fix it. Also, the soundcard I have is an Intel ICH5. Thank you.

Edit: I have a Dell Optiplex Gx270 desktop computer