Two UK PC manufacturers have announced "carbon conscious" computers using VIA Technologies' recently launched low-power C7-D chip. 

Tranquil PC and Evesham Technology have launched what has been misleadingly termed 'carbon free' PCs based on Via's processor.

The C7-D has a maximum power consumption of 20W and claims to set new standards for performance-per-watt operation. Tranquil describes its PCs as " carbon neutral".

At the launch of the chip last month, Via promised to compensate for the carbon dioxide that is produced to power the chip by funding energy conservation, reforestation and alternative energy projects. 

Evesham's green machine is called the Crusader Carbon3 PC, priced at £299 excluding VAT and shipping, and Tranquil is using the chip in its new T7 range. 

The VIA C7-D processor is based on the low profile NanoBGA2 package that measures just 21mm x 21mm and is scalable from 1.5GHz to 1.8GHz.