Intel Core 2 Quad-Core Chip — Kentsfield
November 5th, 2006 . by zealbit-tech.net的一篇专栏,介绍和评测了Intel最新推出的quad-core处理器:Intel Core 2 Extreme QX6700
Kentsfield是QX6700的codename,用的是65-nanometre技术,主频是2.67Hz。真正值得注意的是这一段话:
It’s technically a pair of dual-core chips in one socket, rather than a native quad-core chip. In particular, the Core 2 Extreme QX6700 is a pair of Core 2 Duo E6700 processors on the same CPU package, meaning that the thermal design power has gone from 65W to 130W as a result of adding another two cores.
也就是说,这不是真正的Quad-Core,只是把两个Dual-Core chip封装在同一个socket里,每部分有4MB cache。

这是一张bit-tech上提供的图片,如果将QX6700的封装剥掉,可以看到就是两块独立的chip,不是真正的4-cores-in-a-chip。
Kentsfield的理想IPC (intructions per cycle)是4条指令每cycle每core,也就是说总共允许执行16条指令每个cycle。可惜,这在实际中是很难达到的。
[tags]Intel,Dual-Core,Quad-Core,Kentsfield[/tags]