What is my RAM speed?

Discussion in 'MacBook' started by Nobita, Dec 12, 2010.

  1. Nobita, Dec 12, 2010
    Last edited: Feb 17, 2011

    Nobita macrumors 6502

    Joined:
    Oct 5, 2008
    Location:
    La la land
    #1
    I have recently upgraded my RAM to 4GB from 2GB. But I'm not sure if my machine can take a 1Ghz RAM or 1.3 Ghz RAM. I think I bought the second one as it is backwards compatible (speed will be adjusted by the mother board).

    But when looking at the system profiler:


    [​IMG]

    So what gives? BTW my macbook is late 2008 aluminum unibody (the first unibody macbook)
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    The logic board can not handle RAM speed of 1333MHz, thus the faster RAM is clocked down to 1066MHz, if that is what you are referring too. Nothing wrong with that, it would be strange if it would show up as 1333MHz RAM anyway.
     
  3. Nobita thread starter macrumors 6502

    Joined:
    Oct 5, 2008
    Location:
    La la land
    #3
    Ok, so you mean that the logic board recognises that the ram is 1333MHz, but it know that it needs to slow it down to 1066 Mhz?
     
  4. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #4
    As that RAM is downwards compatible, the logic board recognises the RAM as 1066MHz RAM. If it would be able to detect 1333MHz RAM, it would be able to use it at that speed.
     

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