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发表于 2010-3-5 13:39
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关于i5和i7的turbo技术，相当于处理器在需要超负荷运行时设计了自动超频设置，官方的解释是：英特尔® 睿频加速技术， 能够根据高端工作负载的要求加快速度，从而可以最大化苛刻应用的速度。
有兴趣的朋友可以看看INTEL的英文技术文档：
Intel® Turbo Boost Technology Performance on demand
Intel® Turbo Boost Technology¹ is one of the many exciting new features that Intel has built into latest-generation Intel® microarchitecture codename Nehalem. It automatically allows processor cores to run faster than the base operating frequency if it's operating below power, current, and temperature specification limits.
Dynamically increasing performance
As an independent and complimentary feature, Intel® Hyper-Threading Technology (Intel® HT Technology) along with Intel Turbo Boost Technology increases performance of both multi-threaded and single threaded workloads. Intel Turbo Boost Technology is activated when the Operating System (OS) requests the highest processor performance state (P0).
The maximum frequency of Intel® Turbo Boost Technology is dependent on the number of active cores. The amount of time the processor spends in the Intel Turbo Boost Technology state depends on the workload and operating environment, providing the performance you need, when and where you need it.
Any of the following can set the upper limit of Intel Turbo Boost Technology on a given workload:- Number of active cores
- Estimated current consumption
- Estimated power consumption
- Processor temperature
When the processor is operating below these limits and the user's workload demands additional performance, the processor frequency will dynamically increase by 133 MHz on short and regular intervals until the upper limit is met or the maximum possible upside for the number of active cores is reached.
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