Macbook pro 4GB ram upgrade problem! please help!!!

Discussion in 'MacBook Pro' started by rvdb, Mar 12, 2011.

  1. rvdb macrumors newbie

    Joined:
    Mar 11, 2011
    Location:
    johannesburg, south africa
    #1
    My 15" macbook pro

    specs:
    Model Name: MacBook Pro
    Model Identifier: MacBookPro4,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2,4 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 3 GB
    Bus Speed: 800 MHz
    Boot ROM Version: MBP41.00C1.B00
    SMC Version (system): 1.27f3

    i needed to upgrade my memory as i use my mac for 3D work, so i checked and from what i could find my mac supports up to 4GB.

    the only prob was that i cant get 667mhz memory anymore (i live in S.A) so i bought a 2gb kingston kvr 800mhz stick and it worked perfectly (specs above with the new installed 800mhz ram). my mac downclocked it to 667mhz no problem. so i bought another 2Gb stick thinking that it would just do the same. however when i put it in i just get a blank screen at start up. (the new ram does work, i checked it by swopping it with the other 2gb kington ram and it works fine) i looked around and found that because i didnt have at least one of the original 667mhz sticks in, my mac wouldn't automatically downclock the 800mhz ram to 667mhz.

    is this correct?

    if so is there a way to manually downclock the ram?

    or is there ANY way at all to get around this?

    any help or suggestions are much appreciated!!!
     
  2. troels macrumors newbie

    Joined:
    Sep 26, 2009
    Location:
    Copenhagen, Denmark
    #2

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