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  • Catalyst 8.8 and poorer performance

    I installed the ati propriety catalyst 8.8 drivers and have seen a drop in both glxgears and fgl_gears FPS. I was getting a solid 16000+ FPS in GLX gears and with the new drivers I am getting 10,000+. Anyone else experience this, and if so haave they found a fix for it?

  • #2
    glxgears and fgl-glxgears are not proper benchmarks to gauge performance. My old x1950XT used to get higher glxgears scores than my current HD3850, yet it is obvious that the former is much slower in actual 3D performance.

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    • #3
      Originally posted by Melcar View Post
      glxgears and fgl-glxgears are not proper benchmarks to gauge performance. My old x1950XT used to get higher glxgears scores than my current HD3850, yet it is obvious that the former is much slower in actual 3D performance.
      I understand that the two are not the best, but for a quick check they do give you a benchmark, and when you see a 6000 fps drop in peformance I would venture to say that there is an issue that will relate to your other benchmarks. The question I am asking is has anybody else seen a performance decrease with the new ATI driver, and if so are there settings they needed to tweak in Xorg.conf to get the performance back to where it was initially. Just for the record I am about 15 - 30 FPS slower in ETQW and UT 2004 as well.

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      • #4
        I get 8000 with Radeon 4870, Catalyst 8.8, Ubuntu Hardy 64 bits generic kernel.

        My previous 8800GT gives me 21000 with 169.12, and 15000 with 173.14.12

        ETQW performance is worse than 8800GT, today the game hanged at initial menu, screen was corrupted with lots of very small boxes.
        Last edited by marakaid; 08-23-2008, 07:31 AM.

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        • #5
          8.5-8.8 all provide the same level of performance for me for my HD3850.

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          • #6
            It seems only for CrossFire you need 8-8. For wine 8-5 is still better...

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            • #7
              Originally posted by Kano View Post
              It seems only for CrossFire you need 8-8. For wine 8-5 is still better...

              Yup. There is really no reason to upgrade beyond 8.5, unless the newer revisions have fixes that you can't live without. Overdrive is nice, but not really a must have (and given that it's rather limited in compatibility at the moment); the same with Crossfire.
              Last edited by Melcar; 08-23-2008, 11:47 AM.

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              • #8
                Originally posted by csalsb View Post
                I installed the ati propriety catalyst 8.8 drivers and have seen a drop in both glxgears and fgl_gears FPS. I was getting a solid 16000+ FPS in GLX gears and with the new drivers I am getting 10,000+. Anyone else experience this, and if so haave they found a fix for it?
                I am experimenting the same issue with a readeon HD4850. I had 8200 FPS in glxgears with the 8-7 version . Now I have 4500 FPS with the 8-8 driver.

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                • #9
                  I am not sure, but I have the impression that Neverball is quite laggy since 8.8.
                  However, I still have to check wether this could also be caused by KDE 4 running in background when I have some free time again.

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                  • #10
                    For anyone seeing slower performance with 8.8 try the "nopat" boot option to disable the use of PAT and see if that helps.

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                    • #11
                      Originally posted by bridgman View Post
                      For anyone seeing slower performance with 8.8 try the "nopat" boot option to disable the use of PAT and see if that helps.
                      I wonder if there is more to it than just PAT.

                      I just built a vanilla 2.6.26.3 and

                      # CONFIG_X86_PAT is not set

                      but I now see glitching in the ut2004 demo which does not happen with 8-8 on a 2.6.24.2 (whose config was used to build the 26.3).

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                      • #12
                        Tried the nopat option: little improvement, but still slower than 8-7

                        glxgears:
                        8-7: ~2100fps
                        8-8: ~1500fps
                        8-8(nopat): ~1680fps

                        returned to 8-7 and got the 2100fps
                        also 8-6 yeilded about 2300fps, but was pretty unusable, prior to 8-6 it was consistantly ~2000-2100fps

                        I know glxgears isn't a true benchmark, but it works for comparing results on the same machine to some extent. Besides I can barely play ut2004 on 8-8 now the frame rate is so bad.

                        As far as stability: 8-5 and 8-6 segfaulted on just about anything. 8-7 works nicely. 8-8 has crashed my system a couple of times (once on when switching a youtube video from fullscreen, and another time when playing around with gxine's visualations.)

                        Using:
                        Ubuntu 8.04 64bit
                        2.6.24-21-generic #1 SMP Mon Aug 25 16:57:51 UTC 2008 x86_64 GNU/Linux
                        Gigabyte GA-MA78GM-S2H: (3200 IGP)
                        AMD AthlonX2 4850e
                        4g ram

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