原帖由 itany 于 2007-10-12 17:31 发表
AMD在计算CPU的TDP的时候是扣除了北桥的耗电的
原帖由 itany 于 2007-10-12 17:31 发表
AMD在计算CPU的TDP的时候是扣除了北桥的耗电的
原帖由 itany 于 2007-10-12 17:31 发表
AMD在计算CPU的TDP的时候是扣除了北桥的耗电的
原帖由 jump_sun 于 2007-10-12 17:51 发表
何以见得???貌似AMD官方没这么表述过啊~~~又链接看么~~~
原帖由 itany 于 2007-10-12 17:31 发表
搞错了，抱歉……
AMD确实认为他们是计算了整个处理器的耗电量，包括核心、MC、HTT
但是事实呢？
原帖由 89度热水 于 2007-10-12 22:48 发表
AMD高频的功耗的确超标，但中低端的很少超标的，很多实际功耗都比TDP低，INTEL在P4时代实测功耗远超TDP的多的是，早期步进的PD更严重
How does Intel define TDP?“Thermal Design Power (TDP) is measured under the conditions of TCASE Max, IDD Max, and VDD=VID_VDD, and include all power dissipated on-die from VDD, VDDIO, VLDT, VTT, and VDDA.”This means that TDP, as defined by AMD, is measured at the maximum current the CPU can draw, at the default voltage, under the worst-case temperature conditions. This is the maximum power that the CPU can possibly dissipate. Intel, however, has a different definition.
From the Intel Datasheet for Northwood CPUs:
“The numbers in this column reflect Intel’s recommended design point and are not indicative of the maximum power the processor can dissipate under worst case conditions.”And from Intel’s datasheet for Prescott CPUs:
“Thermal Design Power (TDP) should be used for processor thermal solution design targets. The TDP is not the maximum power that the processor can dissipate.”And the most telling quote of all, contained in both documents:
“Analysis indicates that real applications are unlikely to cause the processor to consume maximum power dissipation for sustained periods of time. Intel recommends that complete thermal solution designs target the Thermal Design Power (TDP) indicated in Table 26 instead of the maximum processor power consumption. The Thermal Monitor feature is intended to help protect the processor in the unlikely event that an application exceeds the TDP recommendation for a sustained period of time.”What this means is that Intel’s TDP is actually lower than the maximum power dissipation of the processor (and as you’ll see later, it can be significantly lower). This is in stark contrast to AMD’s TDP numbers, which are higher than the respective processor’s maximum power dissipation.
原帖由 handelin 于 2007-10-12 23:14 发表
早说了AMD的功耗就是盒子上的张标签,爱标多少标多少,反正就是印个数字,真能这么低功率早就满世界做Mobile文章了，NB平台才是硬道理管你自己说TDP是多少！也不至于现在的"A社移不动"局面了:sweatingbullets:
原帖由 Vitto 于 2007-10-15 14:25 发表
当年P4出了名的耗能高，怎么照样P4M的笔记本到处跑啊。
记得我当年那台P41.8G联想笔记本用电池的情况下才能工作一个小时多一点。
原帖由 elisha 于 2007-10-15 18:31 发表
不是所有P4功耗都高的，只有高频的P4E才那么高的
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