[P1] ibook vs. powerbook

[Andrew]

I thought the iBook and Powerbook used the same battery. With that said you
should get better battery life on the 7447A:

"The new Motorola part is dubbed the 7447A and adds on-the-fly clock
frequency adjustment, allowing system makers to run at reduced frequencies
according to workload. The upshot is longer battery life. And there's now a
temperature-sensing diode included to monitor die temperature, Motorola
says.

Essentially, the 7447A is a revised 7447, itself a low-power version of the
7457. The 130nm 7447 is currently used by Apple in its PowerBook G4. The
iBook is based on the older 7455. The 7447 is a trimmed down version of the
7457, losing the latter's support for external L3 cache. The 7457 and both
versions of the 7447 contain 512KB of on-die L2 cache. All three are fabbed
using silicon on insulator technology."

http://www.theregister.co.uk/2004/02/23/motorola_chip_launch_paves_way/

References to the iBook are the older versions which had a 256k cache
CPU.....


--------- Original Message --------
From: "iBook List" <ibook at lists.themacintoshguy.com>
To: "iBook List" <ibook at lists.themacintoshguy.com>
Subject: [P1] ibook vs. powerbook
Date: 08/06/04 18:29


I know everyone is tired of the perpetual ibook/powerbook debate, but i
have a question that I've had a difficult time finding the answer to in
forum archives.

Situation: Looking to buy a new 12 inch 1 Ghz ibook ($1200) OR a
refurb 12 inch 1 Ghz powerbook ($1199).

Question: Internally, I know that these two models are essentially the
same. The new ibook uses the 7447a G4 processor and the older refurb
powerbook uses the ever-so-slightly older 7447 G4. The only variable
I'm concerned with is battery life. So...anyone out there with the two
above models...could you please post your battery life? (Although any
other observations would be appreciated.) I expect most of you will
have ibook only figures to post though :) that's ok.

Thanks!
-Rob


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