ATHLON vs XEON: number crunching
rbw at ahpcrc.org
Thu Jun 20 07:15:21 PDT 2002
Thu, 20 Jun 2002, Steffen Persvold wrote:
>On Wed, 19 Jun 2002, Joe Griffin wrote:
>> Is your test memory limited?
>> Perhaps it is not the CPU speed but the cache size
>> that is limiting you. The Xeon has a different
>> cache size and Memory type. P4's use RDRAM (high latency/
>> high bandwidth). The AMD may use SDRAM (low latency/low bandwidth).
>Not all Xeons use RDRAM. The new ServerWorks Grand Champion chipsets and
>the new Intel E7500 (Plumas) use DDR RAM (just like the Athlons).
Moreover, I am pretty that RDRAM actually has lower average latency
under load than SDRAM.
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