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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: vince doran who wrote (74704)	10/8/1999 10:01:00 PM
From: brushwud	Read Replies (1) \| Respond to of 1576909

It isn't clear from your link, but he must've used 3DNow! prefetch instructions, not SSE ones. He modified his heavily floating point oriented code, running on an Athlon 500, to use the SSE prefetch instructions and voila! Up to 45% increase in performance...

To: vince doran who wrote (74704)	10/10/1999 4:45:00 PM
From: vince doran	Read Replies (1) \| Respond to of 1576909

More CUmine benchmark speculation: Intel says the CUmine at 600 MHz does 24 SpecFP. If it scaled linearly, that means the 733 would do 29.3. AMD (and others) say the Athlon 700 does 24 SpecFP. The post on JC's page that I previously referred to describes improvements in floating point performance for an Athlon 500 using prefetch code optimizations as high as 45%. If that increase were available to the 700, it would do 34.8. This would seem consistent with AMDs estimates for a 700 wi. 266 FSB and compiler optimizations. Food for thought, for those who can spare time from their religious endeavors. Vince

To: vince doran who wrote (74704)	10/10/1999 9:58:00 PM
From: Charles R	Respond to of 1576909

Vince, <I consider the estimated 266 FSB scores to be fighting today's fire with tomorrow's rain; I am mostly concerned with Athlon 700 performance on Oct. 25.)> A few things to consider: - I seriously doubt if a lot of the performance increase can be attributed to 266MHz bus. The CuMine benchmarks and other datapoints suggest that the biggest jump may be coming from prefetch. - The 180nm Athlons are in production now. The 266MHz bus is scheduled for release in a very short while. All data points indicate AMD will make Q1 shipments for the corporate space. - Intel's numbers are based on 820 chipset and there is no indication that it will be production worthy at launch (yes, it could still be used for benchmarks - probably with a two slot motherboard). Yes, it is a badly needed break for Intel after a host of missteps but is hardly today's fire - And, finally, Q4 builds are in progress and I doubt any benchmarks at this point would have any material impact over Q4 shipments. As has been widely discussed on this thread, AMD truly lost a great opportunity by not enabling motherboard volumes in time for Q3. With a forecast of ~1Mu for Q4, AMD simply lost the momentum to gain significant market share this year. - CuMine vs. Athlon story will begin to unfold in Q1. Chuck