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原帖由 jaguard 于 2008-1-12 06:58 发表 ![]()
那你直接告诉我,CPU内部各部位的温差能有多少度?:shifty:你看热成像,一锅开水都有温差
开水当然可以有温差,不然电站的锅炉设计的不好怎么会爆炸呢?
看看Intel官方是怎么说的:
In the previous Pentium® M processor, a single analog thermal diode was used to measure die temperature. Thermal diode cannot be located at the hottest spot of the die and therefore some offset was applied to keep the CPU within specifications. For these systems it was sufficient, since the die had a single hot spot. In the Intel Core Duo processor, there are several hot spots that change position as a function of the combined workload of both cores. Figure 8 shows the differences between the use of the traditional analog sensor and the use of the new digital sensors.
Figure 8: Analog vs. digital sensors in Intel Core Duo processors
click image for larger view
As we can see the use of multiple sensing points provides high accuracy and close proximity to the hot spot at any time. An analog thermal diode is still available on the Intel Core Duo processor. The use of a digital thermometer allows tighter thermal control functions, allowing higher performance in the same form factor. The improved capability also allows us to achieve better ergonomic systems that do not get too hot, can operate more quietly, and are more reliable. Unlike diode-based thermal management algorithms that require some temperature guard band (or activating the self throttle mechanism as a safety-net), the digital thermometer is tested and calibrated against specifications. Full functionality and reliability of the processor are guaranteed, as long as the reported temperature is equal to or below the maximum specified temperature. Any inaccuracy or offset are programmed into the device and already accounted for.
[ 本帖最后由 itany 于 2008-1-12 15:22 编辑 ] |
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