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If the Powerboook is really getting DDR2...
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Moderator  Join Date: Apr 2000
Location: Gothenburg, Sweden
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If the rumors are true, and the next Powerbook update includes DDR2-533 but no new CPUs, I have one very simple question: Why? The current G4s have a databus that is maxed out at 166 MHz. Regular DDR-400 has more than twice that bandwidth - why increase it further? Does Apple really expect the HD and graphics board to use more than twice the bandwidth that the CPU does? DDR2 had a higher latency than DDR last I saw - whay pay that price if you can't use the extra bandwidth?
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Moderator  Join Date: Sep 2001
Location: Arizona
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1) The 7448 is taking the G4 to 200MHz FSB. Which doesn't warrant DDR2 either, but...
2) DDR2 RAM is already cheaper than DDR and is only getting cheaper.
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I like chicken
I like liver
Meow Mix, Meow Mix
Please de-liv-er
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Moderator Join Date: Apr 2000
Location: Gothenburg, Sweden
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Right, so it's in practice a cost-saving measure.. I'll be expecting a price cut from Apple, then...
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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DDR2 also consumes less power (runs at 1.8V instead of 2.6V).
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Moderator Join Date: Oct 2001
Location: San Jose, CA
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Originally Posted by mduell
DDR2 also consumes less power (runs at 1.8V instead of 2.6V).
DDR is 2.5V actually, not 2.6V. Guessing this is a typo.
Steve
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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Originally Posted by ibook_steve
DDR is 2.5V actually, not 2.6V. Guessing this is a typo.
Crucial says 2.5V at PC2100/2700, 2.6V at PC3200, and 2.8V at PC4000.
But of course the PBs use PC2700, so it would be 2.5V.
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