A question regarding artifacting.

Discussion in '3D Hardware, Software & Output Devices' started by Blakhart, Sep 6, 2008.

  1. Blakhart

    Newcomer

    Joined:
    Sep 27, 2006
    Messages:
    103
    Likes Received:
    0
    I have a card that has an intermittent artifact that shows up on dark backgrounds in the same place every time. Up at the top line of the screen, a string of pixels becomes white. Sometimes I see it at boot on a black screen background, sometimes in games.

    Should I be concerned that this is something that will worsen? It's not running hot, and gets plenty of power from the psu. 7900gtx by the way.
     
  2. Davros

    Legend

    Joined:
    Jun 7, 2004
    Messages:
    14,893
    Likes Received:
    2,311
    start saving for a new card is the best advice i can give you because it could very well die or then again it could soldier on for years
     
  3. Blakhart

    Newcomer

    Joined:
    Sep 27, 2006
    Messages:
    103
    Likes Received:
    0
  4. hoom

    Veteran

    Joined:
    Sep 23, 2003
    Messages:
    2,948
    Likes Received:
    497
    Do you have transparency anti aliasing enabled?
    There was something about that causing a 1/2 pixel offset or something, I recall it causing a white line along the top in Farcry on my Radeon 9800.
     
  5. Blakhart

    Newcomer

    Joined:
    Sep 27, 2006
    Messages:
    103
    Likes Received:
    0
    No, but gamma aliasing was on, so I have disabled it. I generaly run at 2xaa and 16xaf at 10x7 res. I noticed some odd taxturing in one game on certain surfaces, and it reminded me exactly of how an ati rage card rendered the same game back in the day. Perhaps the results seen are caused by similar issues?
     
  6. hoom

    Veteran

    Joined:
    Sep 23, 2003
    Messages:
    2,948
    Likes Received:
    497
    Did that fix the issue?
     
  7. Blakhart

    Newcomer

    Joined:
    Sep 27, 2006
    Messages:
    103
    Likes Received:
    0
    Oddly enough, it seems to have. I have looked for the pixel artifact and the miscoloured textures and they have yet to appear. I have the driver set to high quality, and 16x af.
    One thing, 16xaf seems to be less sharp than I remember it being on other cards....
     
  8. Blazkowicz

    Legend Veteran

    Joined:
    Dec 24, 2004
    Messages:
    5,607
    Likes Received:
    256
    texture filtering is the weak point of geforce 6 and 7 : angle dependant and with some amount of shimmering (that can be corrected in older games by using 8xS or 16xS AA)

    gamma correct anti-aliasing is a feature I can't get to work (I get no anti-aliasing alltogether) so you can probably forget about it.
     
  9. OpenGL guy

    Veteran

    Joined:
    Feb 6, 2002
    Messages:
    2,357
    Likes Received:
    28
    What you're describing is a common artifact of using MSAA. "Corruption" along the top and left edges can occur when an application does a full-screen effect that doesn't cover all the MSAA samples. It's perfectly normal as long as it's limited to a single pixel wide strip.
     
  10. Blakhart

    Newcomer

    Joined:
    Sep 27, 2006
    Messages:
    103
    Likes Received:
    0
    Yep, that's it to a t. It still happens, and unless the background is dark I can't tell if it's continuous or not. It comes and goes with mouse movement and what happens on screen.
     
  11. Blazkowicz

    Legend Veteran

    Joined:
    Dec 24, 2004
    Messages:
    5,607
    Likes Received:
    256
    thanks, that explains the weird top and left lines I get when running Unreal Tournament through zeckensack's glide wrapper (the idea never occured to me to try without AA)
     
  12. Davros

    Legend

    Joined:
    Jun 7, 2004
    Messages:
    14,893
    Likes Received:
    2,311
    you should be running ut with the third party opengl renderer
     
Loading...

Share This Page

  • About Us

    Beyond3D has been around for over a decade and prides itself on being the best place on the web for in-depth, technically-driven discussion and analysis of 3D graphics hardware. If you love pixels and transistors, you've come to the right place!

    Beyond3D is proudly published by GPU Tools Ltd.
Loading...