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Technology Stocks : Advanced Micro Devices - Moderated (AMD)

AMD 214.11

+3.9%

Nov 26 3:59 PM EST

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To: jcholewa who wrote (19177)	11/15/2000 12:48:32 PM
From: Charles R	Read Replies (1) of 275872

JC, <P4 stands to benefit FAR MORE than PIII with prefetch instructions. The whole point of prefetch is that it leverages memory bandwidth to improve effective memory latency. Da-da, da-daaaaaaa! Pentium 4's platform has far better bandwidth than PIII's platform, so liberal use of prefetch won't choke up P4's memory subsystem like it would on PIII.> While there is some truth to this argument. There comes a point when prefetch helps than hurts because of thrashing in the cache. Also, I don't think PIIIs FSB133 was being saturated with prefetches. Bottom line: I do not believe the jump attributable to the FSB400/Dual-PC800 is that much. My guess is about 5% (compared to FSB133/Dual-PC800). <Add to that the fact that specfp is one of the most memory bandwidth constrained benchmarks out there (slight embellishment). Quake is a similar case, though not quite as extreme.> Again, FSB400 helps but I do not believe is the reason for the performance you see. Chuck

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