Will additional PCI gfx card slow down PowerMac G5 general graphics performance?

Discussion in 'PowerPC Macs' started by philosophish, Jan 28, 2010.

  1. macrumors newbie

    Joined:
    Jan 28, 2010
    Location:
    Steeltown, UA
    #1
    Hello,

    Preliminaries:

    1) I am in the possession of a June 2004 PowerMac G5 DP 1.8.
    2) It's the AGP+PCI variety (not PCI-X, not PCIe).
    3) It's running Leopard 10.5.8
    4) I've got an Ultra 6800 DDL installed.

    Main Question:
    What is the best way to add another (3rd) monitor?

    Considerations:
    I think it means adding in a PCI graphics cards, none of which support CoreImage (and QuartzExtreme neither, without PCI-Extreme).
    NOTE: I am using a Kensington USB DualLink on my MBP for 3rd screen, but even though it works under SnowLeopard performance is, well, not so great (only a beta driver).

    I've got my eyes on a (original Mac Ed) ATI RADEON 9200 128MB. (Is there a better/faster PCI card for the G5?)

    Now, will the lack of QE and CI in the PCI card slow down/reduce OSX graphics capabilities for the screens connected to the Ultra 6800? Or can OSX run them independently i.e. apps requiring CI/QE will work on one monitor, but not on the other?

    Side question:
    In fact right now there is somebode selling a PCI FX5200 with 256MB and two VGA-outputs in the bay , claiming it can do BOTH CI+QE, IF run as the ONLY graphics card; is there any substance to this? What, why, how?
    I personally am doubtful, since I thought that CI required AGP x2 or better, which PCI obviously isn't. Thanks.

    NOTE: you'll find it on the .com site by search terms "NVIDIA GeForce FX5200 PCI Mac 256MB Xserve"; don't mean to advertise for the guy or anything, just curious.


    Thanks a lot
    phish
     
  2. macrumors 603

    Joined:
    Apr 15, 2004
    #2
    OS X can use CI/QE on one display but not the other. When rendering on the display on the other GPU, it'll fallback to software rendering.
     
  3. macrumors 68000

    disconap

    Joined:
    Oct 29, 2005
    Location:
    Portland, OR
    #3
    Can't you disable them in software though? Then adding a card to, say, just keep mail and calendar open in (or whatever function you need) would make perfect sense...
     
  4. thread starter macrumors newbie

    Joined:
    Jan 28, 2010
    Location:
    Steeltown, UA
    #4
    Hello, thanks for your answers.

    @disconap: Yes, that would be my intention. I have one (central) working screen, one for auxiliary tools (palettes, tooboxes, whatever) and prefer to have a third screen to keep email and the like open; I wouldn't need CI/QE there, I just want to make sure that they won't be turned off on the capable two screens by the lacking card/display (as in greatest common divisor). I admin that it is a bit spoilt, since I could make do with window shuffling, but I prefer it like this.

    @goMac: Do you mean that OSX generally does not support CI/QE on more than one display or that one display is unaffected by the other's capabilities or lack thereof?

    regards
    phish
     

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