In a message dated 9/18/01 4:18:00 AM, [EMAIL PROTECTED] writes:
<<
>The tech I talked to told me he'd personally had problems with rev A's not
>being able to go over 384, etc (3 128 meg dimms) which was why he had me try
>it in a rev B.
>>
Apple's docs are often out-of-date.
The G3 docs were apparently written when 128 MB SDRAM was the largest
available (Apple was then shipping its machines with 32 MB SDRAMs).
With the Rev. B mobos, Apple began shipping its machines with 64 MB SDRAMs.
The mobo is designed for 3 x 256 MB SDRAM, PC66, although PC100 was supplied
on my G3/300 MT. PC133 also works fine [ * ] .
The addressing limit for the Beige mobo is 768 MB, which is achievable by
using 3 x 256 MB SDRAMs.
Apparently the only difference between MT and DT models is the 333 MHz was
available on the MT but not the DT, apparently due to lack of more effective
cooling in he older 7500-series case vs. the later modified 8600/9600 case of
the MT (shortened from six to three slots).
[ * ] If you use "unbuffered, with EPROM" SDRAMs, then the Beige's memory
controller can interrogate each SDRAM stick individually, and then it can
adjust the accessing of each SDRAM as appropriate. It is for this reason that
the Beige mobo can accept any SDRAM, PC66, PC100 or PC100, in any size
combination, in any plugging order.
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