As PC technology migrates from business and home offices to all parts of the house, so the issue of noise becomes ever more important. Even if you use your PC principally for work, who wants to put up with the constant rattle and hum of cooling fans? If you want to listen to music or watch TV as well as work, then a loud computer is really a non-starter. A number of companies specialise in low-noise systems: earlier this year we looked at the <a href="http://reviews.zdnet.co.uk/hardware/desktops/0,39023850,39149924,00.htm">Poweroid 1200</a>, which is based around the fan-free <a href="http://www.quietpc.com/uk/tnn500a.php">Zalman TNN case</a>. Although effective, this system is also very bulky and heavy. A more house-trained alternative is the Hush ATX from <a href="http://www.hushtechnologies.net/">Hush Technologies</a>: we looked at the living-room-orientated Media PVR model, although Hush does a range of regular-size and small form factor systems aimed at various market sectors -- including business and CAD/CAM users.