Editing Computer cooling (section)

===Waste heat reduction===
Where powerful computers with many features are not required, less powerful computers or ones with fewer features can be used. {{As of|2011}} a [[VIA Technologies|VIA]] [[EPIA]] motherboard with CPU typically dissipates approximately 25&nbsp;watts of heat, whereas a more capable Pentium 4 motherboard and CPU typically dissipates around 140&nbsp;watts. Computers can be powered with [[direct current]] from an external [[power supply]] unit which does not generate heat inside the computer case. The replacement of [[cathode-ray-tube]] (CRT) displays by more efficient thin-screen [[liquid crystal display]] (LCD) ones in the early twenty-first century has reduced power consumption significantly.