Mac Pro Monitor Issue

Discussion in 'Mac Pro' started by Bungloid, Dec 16, 2010.

  1. Bungloid macrumors newbie

    Joined:
    Aug 16, 2007
    #1
    My problem is simple and the solution has eluded me. I come to the board for help.

    I have a three monitor setup, two Samsung B2230 computer monitors and a Sony TV, all 1920x1080 capable. I have them hooked to my Mac Pro running a single ATI Radeon HD 5770 GFX card. The Samsungs are connected by mini Display Port to VGA adaptors and the Sony is plugged straight in through DVI to HDMI.

    The Sony works fine as the third monitor. But the Samsungs are plagued with a resolution issue. They simply will not fill the entire screens real estate without stretching the image. I choose 1920X1080 in the Display resolution settings, and no matter what I have a right justified image with about 2 inches of black bars on the left side. This is happening on both monitors.

    Any ideas on what may be the issue, or how I can fix it? I'm going to copy and paste the pertinent information from the system profiler below. Any help would be appreciated!

    ATI Radeon HD 5770:

    Chipset Model: ATI Radeon HD 5770
    Type: GPU
    Bus: PCIe
    Slot: Slot-1
    PCIe Lane Width: x16
    VRAM (Total): 1024 MB
    Vendor: ATI (0x1002)
    Device ID: 0x68b8
    Revision ID: 0x0000
    ROM Revision: 113-C0160C-155
    EFI Driver Version: 01.00.436
    Displays:
    SMB2230:
    Resolution: 1920 x 1080 @ 60 Hz
    Pixel Depth: 32-Bit Color (ARGB8888)
    Main Display: Yes
    Mirror: Off
    Online: Yes
    Rotation: Supported
    Adapter Type: Analog VGA Or Analog Over DVI-I
    Adapter Firmware Version: 1.20
    SMB2230:
    Resolution: 1920 x 1080 @ 60 Hz
    Pixel Depth: 32-Bit Color (ARGB8888)
    Mirror: Off
    Online: Yes
    Rotation: Supported
    Adapter Type: Analog VGA Or Analog Over DVI-I
    Adapter Firmware Version: 1.20
    SONY TV:
    Resolution: 1920 x 1080 @ 60 Hz
    Pixel Depth: 32-Bit Color (ARGB8888)
    Mirror: Off
    Online: Yes
    Rotation: Supported
    Interlaced: Yes
    Television: Yes
     
  2. peskaa macrumors 68020

    peskaa

    Joined:
    Mar 13, 2008
    Location:
    London, UK
    #2
    VGA? VGA is a pain, and I frequently find it doesn't work well at the higher resolutions. You'll need to get some active MDP to DVI adapters and ditch VGA.
     
  3. dissolve macrumors 6502a

    Joined:
    Aug 23, 2009
    #3
    "Active" is the key. I even had trouble getting Displayport -> MDP because it was a cheaper cable that didn't deliver an active input. Try DVI or HDMI to MDP and should have much better luck.

    EDIT: To confirm, before buying any cables, make sure the Samsungs work with the cable/adapter you're using with the Sony. If they do, it's likely a cable issue.
     

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