Intel has shifted more of its notebook Pentium processor range onto 90nm silicon.

The new 715 and 725 Pentium M processors operate at 1.5GHz and 1.6GHZ respectively. Both have 2MB of Level 2 cache and 400MHz front side bus.

Costs per thousand units bought are $209 and $241, or the same price as Intel's current Pentium M 1.5GHz and 1.6GHz line built at 130nm.

The processors are designed for Intel's 865 chipset and are socket compatible with the previous processor range to allow for easy upgrades.

Intel is claiming that the newer 90nm process not only increases the number of transistors it can place on a chip, but cuts power consumption and thus heat build-up.

No UK manufacturers have yet announced models based on the 715 and 725, but Toshiba and Gateway have adopted the chip in the US.