Check your Ram bus speed

Discussion in 'General Mac Discussion' started by obeygiant, Jan 25, 2005.

  1. obeygiant macrumors 68040


    Jan 14, 2002
    totally cool
    I just got a G5 iMac with 512mb of ram and when i checked the ram bus through Teminal:


    ioreg -p IODeviceTree -n memory -S | grep ram-

    if the results come up with

    "ram-layout-architecture" = <00000002>

    then you have 64 bit bus size

    if the results are

    "ram-layout-architecture" = <00000001>

    then you have 128 bit bus size.

    Having only one chip causes you to have 64 bit, while
    having 2 identical chips (i.e. 2x512 or 2x1gb) you will
    then have a 128 bit bus which i think gives you faster peformance.

    I just got 2 samsung 1gb ddr400 pc3200 chips for $249 a piece and
    installed them and i feel a difference in the iMac now.
  2. ChrisFromCanada macrumors 65816


    May 3, 2004
    Hamilton, Ontario (CANADA)

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