A cock-up on Dell's website has revealed that the Intel plans to release another four mobile processors over the new few months.

Intel yesterday released the first of its "Dothan" chips - processors with the Banias mobile architecture but built with the new smaller 90-nanometre process, making them cheaper and more energy efficient with greater performance.

However, an inadvertent posting on Dell's site showed that it would be offering another four lower-spec processors in the third quarter of this year. Dell admitted to the mistake and has since removed any reference to the future processor. General manager of Intel's Mobile Platforms Group, Anand Chandrasekher, later confirmed the processors would be released "at the tail-end of summer".

Yesterday, the Pentium M 735, 745 and 755 were released, running at 1.75GHz, 1.8GHz and 2GHz respectively. The new processors will run at slower speeds: The 715 will run at 1.5GHz with 2MB of Level 2 cache and a 400MHz front-side bus; likewise the 725 but running at 1.6GHz; the 753 and 733 are low-voltage version of the chips running at 1.5GHz and 1.4GHz respectively.

The Dothan chips contain smaller gates and circuits on the chips than the 130-nanometer process used previously. Dothan processors will have 140 million transistors - twice as many as their predecessors. Pentium M forms the basis of Intel's Centrino mobile package, which also includes the Intel 855 mobile chipset and a wireless network chip.

The Dothan chips are presently supported on 28 mobile products, Chandrasekher said. "By mid-July, our expectation is about 50 systems will be in the marketplace," he said. "We're expecting a very quick ramp on the 90 -nanometer technology." By the third quarter of 2004, more than half of Intel's Pentium M shipments will be based on Dothan, Chandrasekher predicted.