Intel disclosed more information about Silverthorne, this is an upcoming single-core 45nm processor for UMPCs and Mobile Internet Devices (MIDs).
Silverthorne is specifically designed for low-power applications, it will have a power consumption of 2W at most and will usually consume less than 1W thanks to a modular design, aggressive clock gating, deep sleep states and split IO power supply.
The processor will be fully compatible with the Core 2 Duo processor architecture and will run a 16-stage dual-issue in-order instruction pipeline. The Silverthorne processors will be single-core only but Intel has given them HyperThreading support to squeeze out a bit more performance.
The first Intel Silverthorne CPUs will be available in March or April. The Silverthorne will be bundled with the Paulsbo integrated chipset to form the Menlow Intel UMPC platform. Clockspeeds are unknown but Intel said the Silverthorne will reach 2GHz at 1W sometime in the future.
The Silverthorne will compete against VIA's Isaiah architecture which does feature out of order execution.