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

To: Charles Gryba who wrote (93477)	2/21/2003 8:42:07 PM
From: porn_start878	Respond to of 275872

Pete, how is 90nm Opteron going to get 2x the Prescott IPC? I seriously doubt it especially when you factor in hyperthreading. I fear that when Prescott gets 1Ghz FSB and 1MB L2 Cache, larger Trace cache it will actually narrow the IPC gap between it and the hammers. There is actually a very good consequence for AMD of very good performance for Prescott : it will become less likely that Intel do x86-64, giving AMD the oportunity to quietly establish the standard alone... and with the K8 core being so much delayed, it's likely that K9 may kick faster than expected (one would expect the K8 to last a good 3 years, while it could be only two)

To: Charles Gryba who wrote (93477)	2/22/2003 2:36:01 PM
From: pgerassi	Respond to of 275872

Dear Charles: Better check your facts. the only thing doubling is the 8KB L1 data and 512KB L2 caches. It still will be on 800MHz FSB. IPC gains by doubling outside L1 and L2 are not much, at most 5% on average. 90nm Opteron may have twice the L2 as well.Prescott is not going to increase its execution units and decoding width. This is why P4s do so poorly at IPC. At SPECint and SPECfp, 2GHz Opteron is faster than 4GHz NW at 800MHz FSB. And we are not talking about using its 64 bit advantages yet. These will easily outdo the small increment found by doubling the L1 and L2 caches. 5GHz for Prescott will be gotten to only after a year from introduction at least. 2.6Ghz and 2.8GHz is what 130nm Opteron will be at by Q1, 2004. Thus, Prescott will have a hard time competing with a year old 130nm Opteron much less a current 90nm one. Do you think a 5GHz Prescott can hold up against a 4.2GHz 90nm Opteron in 32 bit only code? A 3.8GHz Opteron? Even a 2.8GHz Opteron? A 2.6GHz Opteron in 64 bit mode? By Q1, 2005, Prescott (1 year old) will be considered to be entry level, at best, not because of its speed but, because it can't do 64 bit code. Pete