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Intel Readies New Memory Controller for Nehalem Chips.

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sxs112.tw 發表於 2007-6-12 22:52:07 | 只看該作者 回帖獎勵 |倒序瀏覽 |閱讀模式
Intel’s code-named Nehalem processors have been discussed for nearly five years now, but Intel was tight-lipped enough in order not to disclose details of the new micro-architecture itself as well as implementation peculiarities. Nevertheless, recently Intel started to inform its partners about the future platforms, which means that at least some peculiarities of the new chips have come to light.


It is known that Nehalem as well as Westmere central processing units (CPUs) will use a new platform architecture and while the company does not directly state it, the new platform will hardly use processor system busses, but rather will feature point-to-point serial bus (which is currently referred to as Common Serial Bus or CSI) similar to Hyper-Transport or PCI Express. The new CPUs due in late 2008 will feature so-called dynamically scalable architecture, which means that Intel will be able to tailor its processor designs according to needs of various market segments.

In particular, Intel already announced that, among other things, it would be able to scale and configure caches, interconnect controllers as well as memory controllers. Already now Intel can reduce or increase cache sizes for various processors without many problems, whereas Advanced Micro Devices can enable or disable Hyper-Transport links within its processors depending on their positioning (e.g. AMD Opteron processors for multi-processor servers have three HT links, whereas Athlon 64 for 1P machines have only one HT link). But Intel wants to go even further and scale the number of memory controller channels. According to PC Watch web-site, the top Nehalem processor code-named Bloomfield with four cores will have triple-channel DDR3 memory controller, whereas slightly less advanced may have less channels.

Three memory channels supporting PC3-12800 (DDR3 1600MHz) memory would provide approximately 38.4GB/s memory bandwidth, up significantly from about 21.3GB/s memory bandwidth available today. Given that in 2009 Intel plans to release Nehalem processor with built-in graphics core, triple-channel memory controller may help to keep performance in 3D games on relatively high level.

Intel did not comment on the news-story.


Intel Nehalem to Feature Triple-Channel Memory Controller

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