does 8G RAM works on OSX 10.5.7 and uMBP 470?

Discussion in 'MacBook Pro' started by chrix, May 22, 2009.

  1. chrix macrumors newbie

    Joined:
    Jan 5, 2009
    #1
    I'm just curious, does the 10.5.7 release solved the issue that uMBP 470 can't support 8G RAM?
     
  2. alphaod macrumors Core

    alphaod

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    Feb 9, 2008
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    NYC
    #2
    What's uMBP 470? Is that the older one? If so, it's a hardware issue, so I don't see how a software update can fix that.
     
  3. Sneakz macrumors 65816

    Sneakz

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    Toronto, Ontario, Canada
    #3
    No, 8GB of RAM doesn't work in the MB470LL/A (2.4GHz) model.
     
  4. chrix thread starter macrumors newbie

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    Jan 5, 2009
    #4
    sorry for the confusing, but MB470 and MB471 and even 17 inch MBPs are using the same chipset, so I guess it was just SW/Firmware limitation
     
  5. jav6454 macrumors P6

    jav6454

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    #5
    Software limitation imposed by Apple. The hardware can support 8 GB, Apple just doesn't want to add that support, only for the 17" model.
     
  6. Warranty Voider macrumors 6502

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    #6
    but the 2.66 and the 2.93 GHz can hold up to 8 gigs. Something smells fishy.
     
  7. jav6454 macrumors P6

    jav6454

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    #7
    Apple screwed up, it happens.
     
  8. ViciousShadow21 macrumors 68020

    ViciousShadow21

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    #8
    what i think happened is instead of creating different boards for the high end 15" and 17" they just the same one for both. but the 2.4Ghz is still the old chipset hence half the 3MB instead of 6MB. this is probably why it doesnt support the 8GB of RAM.
     
  9. andrew upstairs macrumors 6502

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    Feb 3, 2009
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    Downtown Los Angeles
    #9
    The 17" and the 2.66 15" use an updated chipset.
     
  10. Sneakz macrumors 65816

    Sneakz

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    Jul 17, 2008
    Location:
    Toronto, Ontario, Canada
    #10
    It has nothing to do with the amount of L2 Cache in the processor. All Intel C2D P8X00 series processors can use up to 8GB of RAM provided the chipset allows it. Not sure what Apple has done to block that, but if you were to pair the P8600 with a PM45 chipset, it would support 8GB (maybe even 16GB) of DDR2/DDR3.
     
  11. Warranty Voider macrumors 6502

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    Aug 27, 2008
    Location:
    Maine, US
    #11
    Be honest with your self. Do you really NEED a whole 8 gigs of RAM? Sure it would be nice, but I doubt you would regularly max it out. I'm just waiting for the prices to come down so that I can get 6 gigs.
     
  12. ViciousShadow21 macrumors 68020

    ViciousShadow21

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    #12
    i know that the cache size has nothing to do with the amount of RAM. i was using that spec to compare the two different logic boards.
     

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