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

To: eplace who wrote (35704)	4/13/2001 10:32:38 PM
From: niceguy767	Respond to of 275872

eplace: "Commentary is already floating around the web that perhaps Intel feels guilty about selling 750MHz CPUs in 1.5GHz clothing, and thus has decided to cut the price by 50% as well." Now, that is funny!!!

To: eplace who wrote (35704)	4/13/2001 11:49:28 PM
From: dale_laroy	Read Replies (2) \| Respond to of 275872

"If performance critical applications drive CPU power above its artificially low 54.7 watt limit, the CPU is halted with a 50% duty cycle (alternating 2 microseconds on; 2 microseconds off) until it cools down." What an absurd approach. If they would just trottle back the clock speed from 1.5 GHz to 1.0 GHz they could drop the voltage. Operating at 1.0 GHz with a voltage drop could cut the power consumption by 55%, providing one third higher performance with 10% lower power consumption than a 50% duty cycle.

To: eplace who wrote (35704)	4/16/2001 9:31:37 AM
From: that_crazy_doug	Read Replies (1) \| Respond to of 275872

<< In order to prevent the CPU from exceeding 54.7 watt, thermal throttling is used. If performance critical applications drive CPU power above its artificially low 54.7 watt limit, the CPU is halted with a 50% duty cycle (alternating 2 microseconds on; 2 microseconds off) until it cools down. This effectively turns your 1.5GHz processor into a 750MHz processor >> Would this mean the p4 isn't nearly as bad as everyone thinks? I wonder if Benchmark processors Intel distributes have this feature turned off? If not it would explain why it gets smeared in a lot of benchmarks. Which makes you wonder is the p4 really worse then an athlon clock per clock or is it that it gets knocked down to a 750 mhz chip whenever it gets hot. This also explains why it scales very poorly when overclocked, because it probably has to spend more time cooling down.