HELP: Only 1/2 RAM Recognized on new iBook

in Current Mac Hardware edited January 2014

A couple of weeks ago, I installed a 512MB RAM module on my new iBook. At the time, the computer recognized the module as 512MB (total=768MB). Now, the computer only recognizes the module as 256MB (total=512MB). Has anyone had this problem? Does anyone know how to fix it? I've tried reinstalling the RAM, but the problem persists.



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