HD6850/HD6870 Overclocking thread

Discussion in 'Video Cards and Graphics' started by Lonyo, Oct 30, 2010.

  1. Lonyo

    Lonyo Lifer

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    Figured I would make a thread for people who have overclocked their HD6800 cards.
    Plus as and when we get better tools (e.g. voltage control) it might be useful.

    Model: Sapphire HD6850 (regular)
    Stock speeds: 775/1000
    Overclock: 850/1055
    Tool(s): CCC
    Voltage: Stock (Unknown)
    Fan: Auto

    Not pushed it beyond any of those settings. Seems stable enough in games.

    MSI Afterburner
    http://event.msi.com/vga/afterburner/download.htm

    Sapphire Trixx (Coming soon)
    http://www.sapphiretech.com/ssc/TriXX/

    GPU-Z
    http://www.techpowerup.com/gpuz/
     
    #1 Lonyo, Oct 30, 2010
    Last edited: Oct 31, 2010
  2. Arsynic

    Arsynic Senior member

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    I'm having issues with the 10.10c driver and seeing higher o/c settings in CCC. What's up with that?
     
  3. WaTaGuMp

    WaTaGuMp Lifer

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    Asus sixty eight fitty
    900/1100
    CCC Overdrive
    Voltage Stock
    Fan @ 50% manual
     
  4. Lonyo

    Lonyo Lifer

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    I'm on 10.10b and seeing 850/1200, but downloading 10.10c to see if that does more than 850, since other people seem to have higher limits than me (like you and WaTaGuMp)
     
  5. Arsynic

    Arsynic Senior member

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    No, I'm saying that I'm not seeing higher O/C settings after 10.10c. I thought it opened up higher OC settings.
     
  6. Lonyo

    Lonyo Lifer

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    Oh, my bad. Didn't understand. Yeah, did nothing for me either, 10.10b to 10.10c I'm still at 850/1200.

    What model/manufacturer is your card?
     
    #6 Lonyo, Oct 30, 2010
    Last edited: Oct 30, 2010
  7. WaTaGuMp

    WaTaGuMp Lifer

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    Could be the Bios on the cards deciding the limits.
     
  8. Arkadrel

    Arkadrel Diamond Member

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    *IF* the max on CCC is 850mhz (caps out option wise), try a differnt program to set speeds with. Like the MSI afterburner or something simular.
     
  9. WaTaGuMp

    WaTaGuMp Lifer

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    Pretty sure they already know that. I think its more of a they want to know why certain people cant get over 850 in the CCC. I had Afterburner already downloaded figuring I was going to need it.
     
  10. deepinya

    deepinya Golden Member

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    Will you get 6870 performance with an o/c'd 6850? Or are there more differences than just the clock speeds?
     
  11. Udgnim

    Udgnim Diamond Member

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    think it's just SP count and default voltage
     
  12. happy medium

    happy medium Lifer

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    You need about 1150 on the core to = a 5870.:( pretty impossible.
    Even a 6870 @ 972 cant beat a 5870.

    Edit:sorry I read 5870. Yes a 6850 @ 1010 core = a 6870


    [​IMG]
     
    #12 happy medium, Oct 30, 2010
    Last edited: Oct 30, 2010
  13. blastingcap

    blastingcap Diamond Member

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    6870 has more SPs. 1120 vs. 960. So it's not just clockspeed difference. VRAM speed is also different@stock but I think they use the same chips so you can oc them equally, in theory.
     
  14. Xzyrus

    Xzyrus Junior Member

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    CCC won't do over 850MHz. Afterburner will if you enable unofficial overclocking in MSIAfterburner.cfg in your C:\Program Files (x86)\MSI Afterburner folder or where ever you installed it.

    I'm sitting at 930/1080 and it seems relatively stable. Some random game benches, 3DMark06, and 20 mins of Furmark didn't give me problems. 950 had some artifacts and 940 crashed my display drivers.
     
  15. flopper

    flopper Senior member

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    sapphire 6850
    10.10 whql
    950/1120
    win 7 64bit

    [​IMG]
     
  16. WaTaGuMp

    WaTaGuMp Lifer

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    Gave my old CPU a little test, shows its age that's for sure.

    [​IMG]
     
  17. WaTaGuMp

    WaTaGuMp Lifer

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    Bumped my OC up a bit, still stock voltage, now at 950/1140
     
  18. Borealis7

    Borealis7 Platinum Member

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    can people who O/C also post a sample benchmark with before and after results to see the gains? thanks.
     
  19. Silverforce11

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    Not bad for stock vcore. Edges out the gtx460 ftw. Is that sapphire model ref design?
     
  20. Arsynic

    Arsynic Senior member

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    Please post load temps and fan speed.
     
  21. Arkadrel

    Arkadrel Diamond Member

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    benchmarks :) pics or it didnt happend (jk) but would be nice.
    Getting a 6850 to 950 core stable... pretty darn nice overclock there.
    How much volt do you need to give it to reach 1ghz?
     
  22. WaTaGuMp

    WaTaGuMp Lifer

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    I ran Unigine right above a few posts. Bumping it up didn't change enough to warrant putting another benchmark up. I gained 1 FPS, min stayed the same and gained about 3 FPS on the max. I don't plan on trying for 1k since I don't want to add voltage.
     
  23. WaTaGuMp

    WaTaGuMp Lifer

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    Anyhow, here is a CCC shot.

    [​IMG]
     
  24. rUmX

    rUmX Senior member

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    Very nice OC there WaTaGuMp. I'm aiming for an Asus 6850 as well for my new build, but they're never in stock.
     
  25. Arsynic

    Arsynic Senior member

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    950/1150
    Idle Temp: 47C Load Temp: 74C
    Fan Speed: 65%

    [​IMG]
    [​IMG]