On Nov 17, 2003, at 6:35 PM, Mathew Peace wrote:
In my previous query on running OS X on the old clamshell iBooks, I have read 2
replies that say they have upped the RAM on their old iBooks to 512MB, when the
max I have read from Apple is 320MB.
How is it possible to exceed the factory maximum RAM?
The factory maximum is calculated based upon the RAM available on the market at the time. It is possible to exceed this when RAM comes out that matches the needs of the slots of the machine. For example, the Lombard is designed to hold 256MB in each slot, but the lower slot can't hold full-height laptop DIMMs. At the time the machine was made, the largest DIMM that could fit in the bottom slot physically was 128MB (128+256=384MB, Apple's factory maximum). But now there are 256MB DIMMs for the lower slot, allowing 512MB to be used in the Lombard. I don't know enough about the iBook's memory system to see if this is true with it or now... but I am cautious.
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