Mixing memory modules in Powermac G5

Discussion in 'Macintosh Computers' started by GreenDice, Nov 5, 2005.

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  1. GreenDice, Nov 5, 2005

    GreenDice macrumors member

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    Oct 5, 2005
    #1
    If I have both CAS3 and CAS4 RAM modules for the PowerMac, will the computer automatically use the lowest speed for both? They are both DDR2 PC2-4200 533Mhz but the CAS3 memory have faster timing.

    If so, I should replace the factory-installed CAS4 RAM with the faster RAM.

    Thanks in advance.
     
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  2. homerjward, Nov 5, 2005

    homerjward macrumors 68030

    homerjward

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    #2
    don't quote me on this but i don't believe the g5 will run it any faster than CAS4. this was also true of the older g5s which wouldn't run anything faster than CAS3.
     
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  3. Sun Baked, Nov 5, 2005

    Sun Baked macrumors G5

    Sun Baked

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    May 19, 2002
    #3
    It's not going to make any significant difference what CAS level you choose.

    Having enough memory to avoid the Virtual Memory penalty matters MUCH MORE than having too little of a more expensive memory choice.

    Too little memory, and you will hit the "as fast as a HD" memory speed bump.
     
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