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  1. #1
    Mac Pro Graphics Card out issue

    Member Since
    May 26, 2009
    Posts
    10
    Mac Pro Graphics Card out issue
    I have a Mac Pro that I just recently installed another Radeon X1900 into. The computer previously had one, and I installed another on the 4th slot. The computer is an older one, I believe it was the first of the Mac Pro, whatever year that was. It has 2 dual core 2.66 ghz processors.

    I am trying to run 4 monitors out of it for a live production. the original graphics card works fine; I have a monitor hooked up to it and am sending another signal out of it using the dvi-component adaptor. The computer is seeing the other graphics card, but when try to send the signal out to another tv monitor (component-bnc-to tv,) it is getting a terrible signal and won't play. It's not black, it's just a lot of interference.

    I installed the second card into slot 4, hoping that it would maximize the x8. Is this the reason why it isn't sending out the right signal? The PCI express slot for slot 1 is set at x16 and slot for is at x8. Has anyone else tried installing a second card into this Mac Pro? Had any issues running it out to anything?

  2. #2
    Mac Pro Graphics Card out issue
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,018
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    Have a look at this from Apple about the Expansion Slot Utility. Probably you need option 4 with cards in positions 1 and 2 only.

    Mac Pro: About the PCI Express slots

  3. #3
    Mac Pro Graphics Card out issue
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    31,466
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.7.5
    Quote Originally Posted by harryb2448 View Post
    Have a look at this from Apple about the Expansion Slot Utility. Probably you need option 4 with cards in positions 1 and 2 only.

    Mac Pro: About the PCI Express slots
    Thanks for the link Harry...I'm thinking of adding a 2nd video card to my Mac Pro...and this info may come in handy.

    - Nick
    - Too many "beachballs", read this: Beachballs
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