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

To: Scumbria who wrote (98605)	3/15/2000 8:55:00 PM
From: Dan3	Read Replies (1) \| Respond to of 1570641

Re: When Willy hits 2 GHz early next year, 1.5 GHz CPU's will sell for $60... Hi Scumbria, If Willamette's 20 stage pipeline is run "double-pumped" so that all instruction must complete within 10ns on a 1GHZ CPU, is it going to be any easier to scale than a Thunderbird or Mustang that single pumps its 10 stage pipeline? Both pipelines spread out the instruction over the same period of time, so if one breaks it out into twice as many stages, each of which has half as much time to complete the instruction, does that really make the chip easier to design and manufacture? Aren't you still limited to the same number of possible transistors that could switch per instruction? Doesn't PIII's single pump 12 stage pipeline allow more ns per instruction (at a given clock speed) than Willamette's double speed 20 stage pipeline? Has Willamette also added more stages for instruction decoding, etc? Does Willamette give itself more time to schedule an instruction? Or is it the same twice as many half the size system? (or just similar clock counts for decoding?) Regards, Dan PS - Won't Mustang on .13 be showing up early next year? At around 2 to 2.5GHZ?