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Thread: gfx overclocking probs




  1. #1
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    Default gfx overclocking probs

    Could someone please tell me why my graphics card produces artifacts when I overclock my cpu? It ran fine for a while, then I started to see corruptions in HL2 Fakefactory cinema mod (flickering textures etc.). I really can't see how the fsb, the ram timings or the voltages can affect the graphics card.

    I used ATI tray tools' overclocker; I reached 445/555 Mhz (400/495 stock), so I lowered the frequencies by a few steps. Then I ran the artifact tester for half an hour and NO ARTIFACTS. But when I overclocked my cpu ( I had lost the settings in the BIOS before I attempted to overclock the graphics card, so I just set optimized defaults and left it at that) I got artifacts even at stock speeds! WHY!!!! Did I just buy an AC Silencer 5 for nothing?!

    Chieftec Bravo LBX01-B-B-SL
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  2. #2
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    Default Re: gfx overclocking probs

    It can generate heat that goes to the video card and causes it to overheat, however the CPU itself would probably be unstable from the heat necessary to do that... Well, maybe not with a Prescott, but that's irelevant.

    Sounds to me like you messed up when you put the Silencer on. Take it off, clean it and the GPU off with Isopropyl (hmm.. I seem to remember telling you this and having a translation issue with Isopropyl), then put Arctic Silver 5 on the GPU and put the Silencer on. There should be an extremely thin layer of AS5 on the GPU.

  3. #3
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    Default Re: gfx overclocking probs

    But if it's a heat issue, why does the card overclock normally (without artifacts) when the CPU isn't overclocked?
    I've got the cooler running at full speed, and get max 53 C at load.
    If I remove the cooler, I might have to reapply the thermal pads for the memory on the board, and I don't have that (it doesn't look like ordinary grease would reach the memory).

    Chieftec Bravo LBX01-B-B-SL
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    Gigabyte GA-K8NXP-9 S.939
    AMD Athlon 64 Venice 3000+ at ~2470 MHz
    OCZ Gold EL PC 3700 Ram, 2.5-3-3-8 at ~456 MHz,
    2x512 MiB
    Gigabyte SilentPipe X800XL, 400/490 MHz
    Auzentech Digital X-Mystique 7.1CH DDL-RCE
    Logitech Z-5500 5.1 speakers
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  4. #4
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    Default Re: gfx overclocking probs

    Did you lock the PCI/AGP bus frequency before OC'ing the CPU?
    Happiness isn't something you experience; it's something you recall.

  5. #5
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    Default Re: gfx overclocking probs

    Yes, he is right. Set the PCI/AGP bus to 67 and it will lock it. When you raise the HTT you raise the PCI/AGP frequency as well. THat would cause your video card to overclock further than you intended.
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  6. #6
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    Default Re: gfx overclocking probs

    I've got a PCI-express card, and the PCI-E clock is set to 100 MHz in the BIOS (as it should be, I think). But, there's another setting in the BIOS, "Robust Graphics Booster", that's set to Auto. I'm not sure exactly what it does (something about enhancing bandwidth), but you can't disable it, only set it to Auto, Fast or Turbo.

    Chieftec Bravo LBX01-B-B-SL
    580 W Hiper Type-R PSU

    Gigabyte GA-K8NXP-9 S.939
    AMD Athlon 64 Venice 3000+ at ~2470 MHz
    OCZ Gold EL PC 3700 Ram, 2.5-3-3-8 at ~456 MHz,
    2x512 MiB
    Gigabyte SilentPipe X800XL, 400/490 MHz
    Auzentech Digital X-Mystique 7.1CH DDL-RCE
    Logitech Z-5500 5.1 speakers
    1 x WD Caviar 8 MiB cache 1600JS-00MHB0 160GiB SATA-2
    3 x WD Caviar SE 16 MiB cache 2500KS-00MJBQ 250GiB SATA-2



  7. #7
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    Default Re: gfx overclocking probs

    Unless you can find the settings that allows you to enable the Async of the AGP/PCIEX bus pipeline/data transfer rate the PCIEX frequency will automatically increase to unacceptible increments everytime you raise the HTT/FSB.

    I have no idea what mobo/bios you have? But, my Soltek K890-Pro w/Award BIOS has the Async disabled by default (found in CPU Ratio/Voltage Control) and unless they're enabled my 6600GT PCIeX card exhibits the same behaviour yours currently is. Try reading your mobo manual again under BIOS settings.
    Last edited by dryadsoul; 02-24-2006 at 12:43 AM.
    Happiness isn't something you experience; it's something you recall.

  8. #8
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    Default Re: gfx overclocking probs

    If the PCI-E clock is set to 100MHz, doesn't that mean that it's locked at that setting? Anyway, I can't find any settings for enabling/disabling the async on PCI-E pipeline. It's simply not there.

    Chieftec Bravo LBX01-B-B-SL
    580 W Hiper Type-R PSU

    Gigabyte GA-K8NXP-9 S.939
    AMD Athlon 64 Venice 3000+ at ~2470 MHz
    OCZ Gold EL PC 3700 Ram, 2.5-3-3-8 at ~456 MHz,
    2x512 MiB
    Gigabyte SilentPipe X800XL, 400/490 MHz
    Auzentech Digital X-Mystique 7.1CH DDL-RCE
    Logitech Z-5500 5.1 speakers
    1 x WD Caviar 8 MiB cache 1600JS-00MHB0 160GiB SATA-2
    3 x WD Caviar SE 16 MiB cache 2500KS-00MJBQ 250GiB SATA-2



  9. #9
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    Default Re: gfx overclocking probs

    If you cannot disable the "Robust Graphics Booster" try running it on Fast and see if it helps. That is a terrible option they decided to put in there with no way to disable it. See if there is also maybe a bios update for the motherboard that either disables or omits this feature.
    GIgabyte GA-990FXA-UD3
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    PC P&C 500W PSU
    2TB Seagate
    Coolermaster 690II w/Corsair H100 tucked under the hood

  10. #10
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    Default Re: gfx overclocking probs

    No luck, didn't help... Seems like I'm running out of options here.

    Chieftec Bravo LBX01-B-B-SL
    580 W Hiper Type-R PSU

    Gigabyte GA-K8NXP-9 S.939
    AMD Athlon 64 Venice 3000+ at ~2470 MHz
    OCZ Gold EL PC 3700 Ram, 2.5-3-3-8 at ~456 MHz,
    2x512 MiB
    Gigabyte SilentPipe X800XL, 400/490 MHz
    Auzentech Digital X-Mystique 7.1CH DDL-RCE
    Logitech Z-5500 5.1 speakers
    1 x WD Caviar 8 MiB cache 1600JS-00MHB0 160GiB SATA-2
    3 x WD Caviar SE 16 MiB cache 2500KS-00MJBQ 250GiB SATA-2



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