I am able to put two 2gb memory modules inside my iMac (24' Late 2006), but the apple website says, that even if I put 4gb the computer will only use 3gb. Is this true?
iMac, Mac OS X (10.7.5)
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Yes. The memory controller of that model and others limits it to recognizing about 3.2GB RAM. The very next generation incresed that limit to 4GB (officially) or 6GB ("unofficially").
