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哎，当年巴顿灭的P4族都不敢吭声的，现在老了老了被I```饭从棺材里揪出来鞭``尸。。。。
真是现在AMD怂了，INTEL N V都敢出来踩一脚了，当年K7+98完美配置时代，哪有现在这些鸟 人蹦达的余地。
jickl 发表于 2009-1-10 01:16 ![]()
巴顿根本没有机会灭同时代的P4,只是延长了K7的生命周期,K7所有系列里最没有创新的就数巴顿.
客观的说K7是AMD历史上改动最大也是最有创新的产品.
下面的描述说的很清楚了, 巴顿面世后,PR rating已经不准确,巴顿也无法与北木竞争.
Fifth-generation Athlon Barton-core processors released in early 2003 featured PR ratings of 2500+, 2600+, 2800+, 3000+, and 3200+. While not operating at higher clock rates than Thoroughbred-core processors, they earned their higher PR-rating by featuring a total of 512 KB L2 cache and, in some models, a faster 400 MT/s front side bus.[19] The Thorton core was a variant of the Barton with half of the L2 cache disabled and thus functionally identical to the Thoroughbred core.
By the time of Barton's release, the "Northwood" Pentium 4 had become more than competitive with AMD's processors.[20] Unfortunately, due to the architecture of AMD's processor caches, an L2 cache increase to 512 KB did not have nearly the same impact as it did to Intel's line. Only an increase of several percent was gained in per-clock performance.[19] The PR rating became somewhat inaccurate because some Barton models with lower clock rate weren't consistently outperforming their higher-clocked Thoroughbred predecessors with lower ratings.[20]
The other improvement, a higher 400 MT/s bus clock, helped Barton gain some more efficiency. However, it was clear by this time that Intel's quad-pumped bus was scaling well above AMD's double-pumped EV6 bus. The 800 MT/s Pentium 4 bus was well out of Athlon's reach. In order to reach the same bandwidth levels, the Athlon bus would have to be clocked at levels simply unreachable.[19]
The K7 architecture had scaled to its limit. Maintaining performance equivalence with Intel's improving processors would require a significant redesign.[19] AMD would soon launch Athlon 64. |
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发表于 2009-1-9 18:44
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