different resolutions for second monitor on imac?

Discussion in 'iMac' started by buckandphollux, Jul 24, 2009.

  1. buckandphollux macrumors newbie

    Jul 24, 2009
    Hi, has anyone got a suggestion for the following problem:
    I have 2 imacs and a mac mini.

    LEFTIE is a 7.1 with a ATI Radeon HD2600 with 256MB RAM, and
    RIGHTIE is a 8.1 with NVIDIA GeFORCE 8800 GS with 512MB RAM
    Mac mini is brand new.

    I have just purchased 3 x LG L246WHX monitors.

    NO matter which one I connect via DVI - HDMI to RIGHTIE the max resolution on the second monitor is 1920 x 1080 although RIGHTIE is still 1920 x 1200, but all of the monitors work just fine on LEFTIE at 1920 x 1200 and on the mac mini. Any ideas?

    Thanks in advance.
  2. Hellhammer Moderator


    Staff Member

    Dec 10, 2008
    Try DVI cable if you have one. If it doesn't help, I would call to Apple or LG
  3. indg macrumors 6502

    Feb 7, 2007
    you may need a third-party app to set a custom resolution. try one of these...
    SwitchResX: http://www.madrau.com/SRX3/index.html
    DisplayConfigX: http://www.3dexpress.de/

    i used displayconfigx on my macbook pro to get the native resolution on my vizio lcd (1280x768) that my ATI video card supports, but os x didn't offer as one of the resolutions for the display.

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