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Technology Stocks : Advanced Micro Devices - Moderated (AMD) -- Ignore unavailable to you. Want to Upgrade?

To: Dan3 who wrote (225705)	2/11/2007 2:54:51 AM
From: Ali Chen	Read Replies (1) \| Respond to of 275872

"That core to cache choke point is so overwhelming that the connection to outside memory traffic is rarely relevant - chopping that connection's speed in half has about a 3% to 5% affect on overall performance (populating only one memory channel)." Your conclusion is not warranted. It simply means that the latency to main memory is much more important than bandwidth on the workloads you have in mind. If a processor stalls due to a need of 16 bits of data, and the next data hazard is not located sequentially in memory, supplying 64 bits or 128 bits at once does not improve any performance, and even can have an adverse effect by thrashing already cached data. Cheers, - Ali