Adding memory and have a ?

Discussion in 'MacBook Pro' started by pgwatson4, Dec 20, 2009.

  1. pgwatson4 macrumors newbie

    Dec 20, 2009
    I have a late 2008 2.4 mhz 15 inch MBPro with 2 gb of ram (1+1). I have one recently purchased 2 gb ram chip to replace one of the 1 gb chips so I will have 3 gb of ram (1+2). The MBPro will not start with the 1+2 in. Do I need two 2 gb chips for the new chip to work?
  2. m85476585 macrumors 65816

    Feb 26, 2008
    It should work with unmatched RAM. Make sure they are both compatible speeds, timings, and voltages. You can try switching which slot the larger module is in since that helps some times. It is possible that the new one is defective, in which case you can try to exchange it.

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