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To: fyodor_ who wrote (32224)3/19/2001 4:51:26 PM
From: jjayxxxxRead Replies (1) | Respond to of 275872
 
RE: Personally, I feel more uncomfortable with the ethics of selling a 1GHz Intel mobile as that, since it actually doesn't run at 1GHz on battery, unless you fidget with the BIOS settings. (at least that is my understanding - I have never actually used one!!)

No BIOS tweaking necessary. You just change the SpeedStep settings for 'maximum performance' when on battery power, rather than 'battery optimized performance'.

JJ

P.S. At least that's the way it is for my Sony Vaio 600 MHz PIII (reduced to 500 using SpeedStep).



To: fyodor_ who wrote (32224)3/19/2001 4:55:11 PM
From: TenchusatsuRead Replies (1) | Respond to of 275872
 
Fyo, <I will say that I haven't actually seen PowerNow! work, so I don't know if it actually does the job it claims on paper.>

Have you read this article?

anandtech.com

This is AnandTech's well-written review of PowerNow and how well it balances performance and battery life for the mobile K6-2+.

1) The "Auto" mode dynamically varies the clock speed, just like PowerNow advertises. It increases the battery life from 127 to 154 minutes on BatteryMark for a negligible hit in performance compared to "Max Performance" mode.

2) The "Max Battery Life" mode basically keeps the processor underclocked (from 500 MHz to 200 MHz in this case) for an additional 20 minutes in battery life compared to "Auto." Performance takes a big hit, but I don't think anyone will notice it all that much while running their word processor or e-mail program. ;-)

<With PowerNow!, the processor will run at its rated speed if you are doing anything that requires the computing power - regardless of battery-state. If you're not doing anything, it will throttle down. To me, that seems more honest (as well as better).>

It may very well be a better solution, but more honest? I don't think so; in fact, the additional flexibility leaves a lot of room open for fudging the facts. At least you know what speed the mobile Pentium III runs at when running off the battery. There will be no way of knowing what speed a processor with PowerNow (or any similar technology) actually runs at in "Auto" mode.

Tenchusatsu



To: fyodor_ who wrote (32224)3/19/2001 7:54:16 PM
From: Joe NYCRespond to of 275872
 
Fyo,

Btw, whatever happened to the enhanced version of PowerNow!?

and what about the enhanced version of SpeedStep, now that I'm on that topic?


I don't know the details of PowerNow in Mustang core chips, but if there is a next version of SpeedStep, which actually does something (rather than define a name for marketing) it will probably be in the Toiletin version of Piii.

Joe