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Politics : Formerly About Advanced Micro Devices
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To: Dan3 who wrote (103085)4/8/2000 3:39:00 PM
From: pgerassi  Read Replies (1) of 1575441
 
Dear Dan:

A point: Athlon decodes into 3 uop PAIRS. Thus each Athlon uop does one ALU/FP and/or load/store. Thus it may be that it takes 3.5 Willi uops average to do a x86 instruction but maybe 2 Athlon uops. Since you pointed out that most code does one (or more) load and/or stores per x86 instruction (reason why CISC uses less instructions), it may show that Willi may not have the appropriate balance with typical applications.

Also, any time a CPU requires more than 1.5 to 2 times the Mhz to do the same task in the same time, it will become obvious to all users, even neophytes, that Mhz is no longer a good metric. The reason it is displaying a tenacity now is that Intel and AMD perform within 10 percent of each other at the same clock. So if Willi at 1.5 Ghz runs like a Mustang at 1 Ghz, people will buy a Mustang at 1.25 Ghz over a 1.5 Ghz Willi.

Pete
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