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To: fingolfen who wrote (139148)	7/12/2001 6:39:03 PM
From: Ali Chen	Read Replies (1) \| Respond to of 186894

"I would worry about comparing the 1.6GHz K7 ... to a 2.2GHz P4" Yep, a 2.2 would be a serious competitor. Yet it reminds to be seen if Intel is capable to manufacture it. "(which I scaled out to 73.58, BTW)" No, your model is inaccurate. Given Anand's numbers, upper limit of projected score is 73.40@1600. "The K7 is great design, but given the superior scaling of the P4, it's clear that it is not architecturally in the same league as the P4 for the long haul..." Although your numbers are inaccurate, the performance trend you captured is correct. However, your conclusion about "architectural league" is wrong. The current problem of AMD is not in the CPU but in the system chipset design. - Ali

To: fingolfen who wrote (139148)	7/13/2001 2:14:21 AM
From: Dan3	Read Replies (1) \| Respond to of 186894

Re: P4 Scaling vs. Athlon Scaling You are comparing AMD's old core (thunderbird) with Intel's newer core (Willamette). There will never be a 1.6GHZ K7 with the core you are considering. The Palomino core is already in production for mobile and MP versions of Athlon and has design changes that support better scaling such as hardware prefetch and some others (larger BTB size? - I don't recall off hand). But the bottom line is that you need to go back look at the IPC scaling of Palomino if you want to extrapolate AMD's 1.6 or 1.7GHZ performance - because that's the core that will be used in those chips. Cadalyst Magazine just released a bunch of tests comparing a 1.2GHZ Athlon (palomino core) with a 1.7GHZ Xeon and found them to be basically tied in performance. cadalyst.com So a 1.6GHZ Athlon would be expected to perform about the same as a 2.5GHZ P4 - depending on scaling, but preretch etc. is designed to let the newer core scale better than the old one that you used in your analysis.