14 Dec
2011
14 Dec
'11
1:33 p.m.
I have a Mac LC475 (same machine as Quadra 605), and
I'm looking to max out
the memory. None of Apple's tech notes mention anything about EDO memory,
and people tend to generally think that it can handle it, but I've been
bitten before. Does anyone have a good idea about whether the memory
controller can handle it? Also whether it can actually take advantage of
it? My gut feeling is yes to the first and no to the second.
I am pretty sure you are correct, and I *think* my Q605 actually does have
EDO in it, but I would have to check it (it's not easily accessible at the
moment after I retired it from active duty).
There is some dispute over total memory. LowEndMac, which I tend to believe
more, says that 128MB SIMMs have been used up to a maximum of 132MB. However,
it is known that double-banked 64MB SIMMs won't work, and I would be very
cautious about 128MB SIMMs. My unit has 32MB in it for a total of 36, which
is the stated maximum (and the maximum for the LCIII that preceded it, for
that matter) and the maximum that EveryMac says. So I'd be careful about
going higher or you may be buying duds.
The Q605 is an underappreciated gem, especially with a full '040. Mine ran
NetBSD exceptionally well until I merged its functions into the POWER6. Now
my only '040 left is the Mystic Color Classic.
I get my old RAM from MemoryX. They're not the cheapest, but I've never got
a bad one from them, and they're relatively local (Santa Clara Valley).
--
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Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com
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