Tucked away in a corner of Frostytech is a collection of acoustical absorbing / barrier / sealing & vibration damping materials, originally provided as a material sampler some years ago by the company Polymer Technologies. If you want to sound proof your computer a little more extensively than melamine foam can offer, this is a good primer on what different material technologies are commercially available.
FULL STORY @
FROSTYTECH (http://www.frostytech.com/soundmat1.cfm)