Michael Dell has recommitted his company to doing its best to save the planet by producing more energy-efficient products.

Speaking at Oracle's OpenWorld conference in San Francisco, Dell provided statistics reminiscent of Sun Microsystems' environmentally friendly pledge centred on its UltraSparc T1 chip.

While Sun positioned its processor as the first environmentally responsible chip, Dell claimed that if all the products his company shipped last year had included the energy-efficiency settings of the new Dell OptiPlex 745 desktop, the savings in carbon dioxide emissions would be equivalent to removing 2.5 million cars from the road, or $1.6bn (about £860m) in cash.

Along with announcing two new PowerEdge servers, the first to be powered by Opteron processors from AMD, Dell also mentioned his company's next move with long-time chip supplier Intel.

Within the next few weeks, Dell will start rolling out computers using Intel's 'Clovertown' Xeon quad-core chip, with models including the PowerEdge 1950 server, the Precision 690 workstation and Dell's XPS gaming machines, he said.