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dual 867 memory upgrade
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Registered User
Join Date: Oct 2003
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Can someone recommend a memory upgrade for my machine? I have 2x512 and 1x256. Can I put a 1gb chip in? will THIS work?
Thanks! 
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Addicted to MacNN
Join Date: Jan 2003
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Pretty sure you're limited to 2.0GB; one 512MB module in each of the four slots. I don't think the 1GB modules are supported in that machine.
Check www.crucial.com for memory. Always good quality and guaranteed compatibility.
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Moderator  Join Date: Sep 2001
Location: Arizona
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Oddly enough, the MDDs will work with 1GB modules. But for some reason that I have heard is related to the system controller, the system will only recognize 2GBs, even with four 1GB DIMMs installed.
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I like chicken
I like liver
Meow Mix, Meow Mix
Please de-liv-er
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Registered User
Join Date: Oct 2003
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Thanks Guys,
PowerMacMan, so in not recognising does that equate to not utilizing it and thus being wasted?
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Moderator Join Date: Sep 2001
Location: Arizona
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Essentially.
Whether or not this is something that can be fixed in the future with a firmware update or something similar, I do not know. But for now, it would be a waste.
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I like chicken
I like liver
Meow Mix, Meow Mix
Please de-liv-er
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Addicted to MacNN
Join Date: Jan 2003
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Same deal with the Yosemite G3 and the Yikes! G4... they support up to 1GB of RAM (4 x 256MB)... but it'll still "work" if you pop in a 512MB module - it'll just recognize it as a 256MB module. The rest will be wasted.
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Moderator Join Date: Sep 2001
Location: Arizona
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Originally posted by Cadaver:
Same deal with the Yosemite G3 and the Yikes! G4... they support up to 1GB of RAM (4 x 256MB)... but it'll still "work" if you pop in a 512MB module - it'll just recognize it as a 256MB module. The rest will be wasted.
Similar.
Though from what I have been hearing... If you put a 1GB stick in an MDD, it will recognize the full 1GB and use it. If you put a second stick in, same thing, and you'll have a full 2GB. But if you put in a 3rd or 4th 1GB DIMM, the system will still only see up to 2GBs. I am not sure if it starts to see all of the DIMMs as 512MB if you put in four 1GB DIMMs, or if it simply doesn't see the second 2 DIMMs at all.
The fact that it will see and use a 1GB DIMM does make me think that at one point in the future, after a firmware update or something, that the MDDs will see 4GBs.
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I like chicken
I like liver
Meow Mix, Meow Mix
Please de-liv-er
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