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    Installed 3gb of ram in the MBP...

    Discussion in 'Apple and Mac OS X' started by xprohx, Mar 15, 2007.

  1. xprohx

    xprohx Notebook Evangelist

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    ...and I have a question.

    I installed an extra 2gb stick of pc2 5300 ram in my macbook pro in addition to the 1gb stick that came from the factory and the system information is showing I have 3gb of ram @ 533mhz. However, when I had 2 x 2gb ram the speed was at 667mhz. What is the difference other than it is not operating in dual channel to make the speed be lower?

    From the box: G.skill DDRII667 PC2-5300 2048 x 1
     
    xprohx, Mar 15, 2007
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  2. RadcomTxx

    RadcomTxx Notebook Deity

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    the ram stick you put in is prolly slower then the others were, so the system slows it down to the slowest ram chip.
     
    RadcomTxx, Mar 15, 2007
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  3. vespoli

    vespoli 402 NBR Reviewer

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    If you have mis-matched SODIMMS, the system will run at the slower speed (533 if that's the speed of your 1x1024 stick)
     
    vespoli, Mar 15, 2007
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  4. xprohx

    xprohx Notebook Evangelist

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    I just checked the single 1gb stick installed by apple and it is indeed pc2 5300 667mhz ram. However, the Cas Latency is different. The 1gb stick is 5-5-5-12 and the 2gb is 5-5-5-15.
     
    xprohx, Mar 15, 2007
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