[[flAsh]]

a lot of thing depends upon processor's ISA. the depth of pipeline, its width, memory bottlenecks, die size and many other instructions like 3dnow!, powernow!, HyperThreading. Mind it the pipelines of Prescott r deep but not wide due to which there die size is small and they have higher clock speeds 2 eleminate errors while data is pipelines, the transistor density increases as soon as u decrease die size resulting in power loss and increase in temperature. Amd 64 ones have shollow pipelines and a little big die size due to transistor density is less and loss of power is less and that's why there temperature is lower than prescott. HT does wonders in case of intel but its part is negligible due to the shallow pipelines used in AMD 64, G5/G6 processors due to which there is performance is way higher than Intel ones. Moreover Integerated memory controller also increases AMD performance. But mind it in Multiprocessor boards Intel will perform higher than AMD if ATHLON 64or 64 FX is used but Opteron will get ahead intel once again