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


To: Charles R who wrote (69628)8/23/1999 5:13:00 PM
From: Scumbria  Read Replies (2) | Respond to of 1572657
 
Chuck,

what kind of speed improvements are likely on Athlon as they go from 0.25 to 0.18 given that the transistors are already at 0.18. We missed your expertise on how transistor delays, interconnect delays, and clock skew contribute for this class of designs. Any comments?

I'm certainly not a process expert, but I don't expect to see a very large transistor speedup from 0.18u. Copper will however make a significant impact on wire delays. I wouldn't be surprised to see >20% clock speed improvement out of the 0.18u copper process (relative to current production.)

Clock skew is a very serious problem for large designs like K7. Depending on the floor planning and layout, it may steal >10% of the cycle time.

I expect that a K7 cycle times will increase dramatically over the next 6 months, just due to speed work. Once the design became stable, I suspect that AMD shifted a lot of resources into speedpath debug.

Sorry about my "disappearance", but I've been very busy at the new job, and rather bored by the lack of substantive Intel/AMD news.

Scumbria



To: Charles R who wrote (69628)8/23/1999 5:20:00 PM
From: steve harris  Read Replies (1) | Respond to of 1572657
 
Here ya go Charles, the evil empire....

theregister.co.uk

Just glad to be here.
:o)

steve