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ATi 5000 Series Image Quality Analysis



Introduction

This article is part three of a trilogy of articles devoted to the Juniper/Cypress series. In part one I covered performance. Part two covered bottlenecking and determined the 5770’s primary limitation isn’t memory bandwidth as many believed.

This article will investigate the 5770’s image quality and focus on anisotropic filtering and super-sampling. The system setup and methodology is exactly the same as in part one.

While the primary purpose of this article is to investigate the 5770’s image quality, the inevitable comparison to nVidia (GTX285) will also be made as required. For a refresher concerning image quality, please see the following articles I’ve written on the subject in the past:

Everything in those articles about ATi’s 2xxx/3xxx/4xxx series applies to the 5770, minus any differences covered in this article.

  • BFG10K

    That’s an interesting program there, Tamlin. AFAICT the ALU version is reference AF run in “software”, while the TMU version is the card’s native hardware implementation.

    In that case it’s hardly surprising that there’s a difference between the two on your card.

    On my GTX470 the two are almost identical, even with the ALU version set to 512xAF. Both have the same texture aliasing though, which proves even the strongest AF still needs super-sampling to clean it up.

  • Tamlin

    Its not equal on the 5870. I made a post on B3D to see if they can explain what is wrong and if its broken somehow:
    http://forum.beyond3d.com/showthread.php?t=57870

  • Tamlin

    Check this out:
    (in German, but pictures are pictures and they were made with an HD5700/5800)
    It looks, like the new AI options (Performance -> Quality -> High Quality) influence the texture quality by adding more samples. But did AMD really improve the filtering quality? Or did they only decouple filtering chea… optimizations from game fixes, Crossfire…?
    http://forum.beyond3d.com/showpost.php?p=1484429&postcount=85

    Seems 10.10 beta with a reghack does some improvements. :)

  • BFG10K

    There’s also a leaked slide that basically confirms my findings, and shows the 6000 series fixes it:

    http://img217.imageshack.us/img217/7882/355595ds.png

    Heck, they even use a similar tester app to mine to demonstrate the difference. :)

    Oh, and check out my latest GeForce 400 image quality analysis article: http://alienbabeltech.com/main/?p=21497

  • army mos

    Interesting blog, I’m going to spend more time reading about this topic