Not 5ghz? Expected 6 months ago? Why so conservative?
the Prescott range at launch tops out at 3.4GHz (new 3.4GHz versions of Northwood Pentium 4 and Pentium 4 Extreme Edition are also being launched at the same time). It will scale up to at least 5GHz over time: Intel has introduced strained silicon -- where the material is stressed to align the molecules and ease the passage of electrons through the matrix -- and replaced the old cobalt silicide chemistry with nickel silicide, which also reduces electrical resistance. Layout of the chip's major subsystems is radically different: automated reshuffling of the computational units, buses and control logic in order to improve clock distribution around the chip has meant that not all logically linked functions are in the same physical area. http://reviews.zdnet.co.uk/hardware/processorsmemory/0,39024015,39145218,00.htm
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