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17" Reduced processor speed
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Mac Enthusiast
Join Date: Jun 2000
Location: Sacramento, CA, USA
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Energy saver gives an option to reduce processor speed on the 17" PowerBook. Anyone know what speed it is at on this setting?
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Dedicated MacNNer
Join Date: Oct 2002
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Professional Poster
Join Date: Jan 2003
Location: WV, USA
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The 667Mhz is correct, but it may also be of importance to know that the energy saver setting *disables* the L3 cache, further slowing it's ability & saving juice.
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Forum Regular
Join Date: Nov 2002
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is the reduced processor speed of a Powerbook 12" also 667 MHz?
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Professional Poster
Join Date: Jan 2003
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I'm not sure of that, however, it's stated in the 12" PB's user manual if you have one.
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Forum Regular
Join Date: Nov 2002
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heh, that's a good tip -- haven't cracked open a user's manual for a Mac in years so I didn't even think of that.
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Mac Elite
Join Date: May 2003
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Originally posted by TheGreatButcher:
Energy saver gives an option to reduce processor speed on the 17" PowerBook. Anyone know what speed it is at on this setting?
At reduced processor speed the 17" runs at 667Mhz and the L3 cache is turned off.
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iMac 24" 2.8 Ghz Core 2 Extreme
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Fresh-Faced Recruit
Join Date: Mar 2003
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just wondering would lowering the clock speeds extend the battery life of the 12" or 17" if you were to use to watch a DVD or something like that?? thanks and does any one know how much longer the battery lasts? 
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Professional Poster
Join Date: Jan 2003
Location: WV, USA
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Originally posted by appleleo323:
just wondering would lowering the clock speeds extend the battery life of the 12" or 17" if you were to use to watch a DVD or something like that?? thanks and does any one know how much longer the battery lasts?
Lowering the Mhz speed to watch a DVD pretty much ensures that you can watch a full 2-hour movie on a single charge, but doubtful that you'll get much more.
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5G 60GB video iPod
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Mac Elite
Join Date: Mar 2003
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So how much more time percentage wise we looking at running it at 667?
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Addicted to MacNN
Join Date: Dec 1999
Location: Pleasanton, CA
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It depends on what you're doing. Generally speaking, you'll save about fifteen minutes of battery life by not running your PowerBook's processor at full speed. The optical drive and screen also drain considerable amounts of power.
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Registered User
Join Date: Jul 2001
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Mac Elite
Join Date: Feb 2001
Location: France
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Originally posted by crouchingtiger:
...haven't cracked open a user's manual for a Mac in years...
me neither
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