Memory question, just received upgraded memory from OWC

Discussion in 'iMac' started by pdxa4, Aug 4, 2008.

  1. macrumors regular

    Joined:
    Aug 4, 2008
    #1
    Hi there,
    I have a new 24" iMac 2.8Ghz which we just recently purchased. Loving it so far and it is our first Mac...

    This unit comes with 2GB 800Mhz RAM memory. As I have also got Aperture I found performce to slow down a bit, so I ordered from OWC their Samsung 4GB upgrade of PC6400 DDR2 memory which was clearly listed as 800MHz.

    So I just received the memory in the mail today, and I read the sticker on the memory which says the following...
    2GB 2Rx8 PC2-6400S-666-12-E3 and M470T5663QZ3-CF7 0813

    I did not take the memory out of the packaging

    From a web search that i did it looks like these memory units are at 666MHz, not the 800MHz that I should have been sold...

    I just sent a email onto OWC to their sales dept (too late to call them), and I hopefully will hear from them tmrw.

    I just wanted to be on top of the details and to check in with the experts on this forum. What is your opinion of the above ? Is there a 800MHz version of the Samsung memory, or has anyone else ran into a similar issue with OWC before ?

    Many thanks everyone...:apple:
     
  2. macrumors 6502a

    Joined:
    Jul 7, 2008
    Location:
    Tulsa
    #2
    PC2-6400 should be 800MHz, because 667MHz is the speed for PC5300. Also I just googled PC2-6400 and came up with a lot of "800MHz" so that should be 800MHz RAM :)
     
  3. macrumors G5

    CanadaRAM

    Joined:
    Oct 11, 2004
    Location:
    On the Left Coast - Victoria BC Canada
    #3
    Numbers - yer reading them wrong


    PC2-6400S-666-12-E3

    PC2 means DDR2

    6400 means 6400 Mb/sec bandwidth / 8 bits per byte = 800 MHz memory

    666-12 means latency values of 6-6-6-12
    Sometimes abbreviated as CAS Latency 6 or CL6 (CAS - Column Address Strobe - is the first and most important of the latency values)

    This RAM is fine for your iMac.
     
  4. thread starter macrumors regular

    Joined:
    Aug 4, 2008
    #4
    Thanks to both of you for your great response.
    I just wanted to get a good backround check.
    Good news then on the memory. I will install it tmrw evening.
     
  5. macrumors Core

    alphaod

    Joined:
    Feb 9, 2008
    Location:
    上海 (Shanghai)
    #5
    Yes they are all right.
     

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