DDR3 1333 Ram in 2009 13" MBP

Discussion in 'MacBook Pro' started by emiljan, Jun 23, 2011.

  1. emiljan macrumors 6502

    emiljan

    Joined:
    Jan 25, 2010
    Location:
    Michigan
    #1
    Hey guys,

    I just upgraded my 13" MBP ram from 4 to 8GB and i have a question. The ram i got is DDR3 1333Mhz and which is faster than the stock ram which ran at 1066Mhz, so when i installed the new ram and under windows 7 i ran CPU-Z to check the actual speed of the ram and it shows its running at 663Mhz, so i don't understand, is my MBP underclocking the ram?

    Here is a pic i took of CPU-Z under Win 7.
    ram.JPG
     
  2. mdnz macrumors regular

    Joined:
    Apr 14, 2010
    Location:
    The Netherlands
    #2
    Since you have DDR Ram, you need to double the frequency. So it's 663x2 = 1326 Mhz, which seems about right.
     
  3. emiljan thread starter macrumors 6502

    emiljan

    Joined:
    Jan 25, 2010
    Location:
    Michigan
    #3
    So its running at the full 1333Mhz speed than. Sweet. The tech/sales guy where i purchased the ram said that the memory will down-clock to the correct speed.

    So i'm running the same speed as the new 2011 MBP's. This is great.
     

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