20" 2.1ghz iMac memory?

Discussion in 'Macintosh Computers' started by psoin, Nov 8, 2005.

  1. macrumors newbie

    Joined:
    Nov 8, 2005
    #1
    Hi,
    I just received and installed a 1GB memory stick from OWC and the system profiler shows this:
    Size: 1 GB
    Type: DDR2 SDRAM
    Speed: PC2-4200U-444
    Status: OK

    Does the 444 stand for the mhz?
    Shouldn't the memory be 533 mhz?
    How do I test to make sure it is the correct speed?

    Thank you for your help.
    P.S.

    BTW It's my first MAC and its great!
     
  2. macrumors 6502a

    DaftUnion

    Joined:
    Feb 22, 2005
    Location:
    Wisconsin
    #2
    Simple answer, no. PC 3200 memory is actually 400mhz...PC 4200 memory is 533mhz...about 99% sure on that.
     
  3. macrumors 6502a

    DaftUnion

    Joined:
    Feb 22, 2005
    Location:
    Wisconsin
    #3
    Actually, somebody else should help out on the forum...4200 isn't mhz...but you might be right on that second part saying the number after 4200...not sure on this one:confused:
     
  4. macrumors regular

    Joined:
    Dec 17, 2004
    Location:
    Omaha NE
    #4
    When memory is labeled PC2-8000, they are talking about the bandwidth 8.0GB/s. When memory is labeled DDR2-1000 they are talking about the frequency: 1GHz.

    1GHz DDR2 memory has a maximum bandwidth of 8GB/s
    900MHz DDR2 memory has a max of 7.2GB/s
    800MHz DDR2 memory has a max of 6.4GB/s
    667MHz DDR2 memory has a max of 5.3GB/s
    533MHz DDR2 memory has a max of 4.2GB/s

    I believe 1GHz is the fastest available.
     
  5. macrumors 68000

    nospleen

    Joined:
    Dec 8, 2002
    Location:
    Texas
    #5
    I predict that CanadaRam will post a reply in 3, 2, 1,...:D
     
  6. macrumors 6502a

    Xephian

    Joined:
    May 2, 2005
    Location:
    United States
    #6
    The 444 after PC2-4200U is the latency timing of the RAM. The tighter the timing for the RAM the faster the RAM will be.
     

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