1. Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Need help overclocking 7950 with Trixx

Discussion in 'AMD / ATI' started by UbErN00b, Oct 24, 2012.

  1. UbErN00b New Member

    Joined:
    Sep 5, 2012
    Messages:
    257 (0.33/day)
    Thanks Received:
    46
    Location:
    Ingerland
    Need some AMD overclokers who are familiar with Trixx or other AMD OC tools, here's a step by step rundown of what I have done so far...

    • Got a Sapphire HD 7950 Vapor-X OC (950mhz boost on 2nd bios)
    • I can OC with AMD OD to 1070mhz core and 1575mhz RAM
    • Try to OC core more than 1070 and get a driver lockup and recover
    • No voltage control in amd OD (power limiter already set to +20%)
    • Installed Trixx and set to 1600mhz RAM, 1100mhz core, +20 power limiter and VDDC to 1100-1150
    • Run benchmark (3dMark11) crashes with driver fault
    • Trixx core and mem clocks stay the same though VDDC always returns to 975
    • GPUZ never reports any change in VDDC, always stays at 1.035v regardless of settings in Trixx

    Hopefully that will give you an idea of what my issues are, just a few things....

    In AMD OD I can hit 1070core 1575mem (top clock) with no voltage adjustment.

    I would like to hit 1100+ core so think I need to be tweaking voltage. Is this what VDDC is for in Trixx?

    Why doesn't GPU-Z notice change in VDDC? Why does Trixx return to stock 975 VDDC when driver recovers?


    TL;DR

    I want to hit higher than 1070mhz core which is the highest stock voltage OC on my 7950. How do I do it?
     
    3870x2 says thanks.
  2. 3870x2

    3870x2

    Joined:
    Feb 26, 2008
    Messages:
    4,875 (2.00/day)
    Thanks Received:
    689
    Location:
    Joplin, Mo
    BuMp! I would like to know the answer to this also, as I have just received my Sapphire 7950.

    Haven't installked TriXX yet.

    How long were you testing at 1070? Just one 3dmark run?

    I know your PSU is sufficient. my 7950 does great on my 650w.
     
  3. UbErN00b New Member

    Joined:
    Sep 5, 2012
    Messages:
    257 (0.33/day)
    Thanks Received:
    46
    Location:
    Ingerland
    I have ran quite a few games including Metro, Sleeping Dogs, FEAR ( just for shits and giggles on benchmark mode) and several 3DMark11 runs with no crashing at 1070/1575
     
  4. Phusius

    Phusius New Member

    Joined:
    Mar 23, 2012
    Messages:
    1,318 (1.40/day)
    Thanks Received:
    380
    I use Msi Afterburner with my Sapphire 7950.

    1100/1500 @ 1174v 20% slider, 1606v vram

    100% stable
     
  5. UbErN00b New Member

    Joined:
    Sep 5, 2012
    Messages:
    257 (0.33/day)
    Thanks Received:
    46
    Location:
    Ingerland
    Ok will give Afterburner a go, what's your default vram voltage? I seem to be able to run 1600 stock volts
     
  6. Phusius

    Phusius New Member

    Joined:
    Mar 23, 2012
    Messages:
    1,318 (1.40/day)
    Thanks Received:
    380
    1606 is my vram voltage, i bumped it up just a tad for shits and giggles
     
  7. UbErN00b New Member

    Joined:
    Sep 5, 2012
    Messages:
    257 (0.33/day)
    Thanks Received:
    46
    Location:
    Ingerland
    My Sapphire 7950 is still throwing up driver crashes at 1080 core all the way up to 1250v??? WTF, it will do 1070 on stock but wont budge from there even with more volts?
     
  8. 3870x2

    3870x2

    Joined:
    Feb 26, 2008
    Messages:
    4,875 (2.00/day)
    Thanks Received:
    689
    Location:
    Joplin, Mo
    That is really odd. Have you tried something like furmark on 1070? If it comes to the point that you have no idea, I would check long term stability on 1070. If it survives, it looks like it may be a poorly fabricated chip.

    I more or less have the same Video card you do. I will do 1070 and up this friday or saturday and post my results.
     
  9. Phusius

    Phusius New Member

    Joined:
    Mar 23, 2012
    Messages:
    1,318 (1.40/day)
    Thanks Received:
    380
    All part of the silicon gamble from what I understand, mine has artifacts if I go past 1125 core. So I leave it at 1100.

    Though I have read some people getting 1300 with this same card... so yeah silicon gamble is all.
     
  10. UbErN00b New Member

    Joined:
    Sep 5, 2012
    Messages:
    257 (0.33/day)
    Thanks Received:
    46
    Location:
    Ingerland
    OK, update, my core clock seems to be affected directly by my memory clock, which I didn't think was the case, however in benching some more I have realised that lowering the seemingly stable mem speed of 1575 directly affects what I can OC on the core, I thought they were seperate entities these days?

    So to cut a long message short, I have broken 1100 core by reducing my vram to stock 1250 and am now at 1140 on the core, also seems stable with mem at 1400 at that core speed. I am slowly raising both to find an equilibrium and will be back, endless runs of 3dMark11........ YAY :rockout: :rolleyes:
     
  11. james888

    james888

    Joined:
    Jun 27, 2011
    Messages:
    4,540 (3.74/day)
    Thanks Received:
    1,693
    I personally prefer trixx. Much simpler and cleaner interface. I could reach the exact same overclock with it that I could with AB between 2 msi 6950's and a saphire 7970.
     
    Crunching for Team TPU
  12. UbErN00b New Member

    Joined:
    Sep 5, 2012
    Messages:
    257 (0.33/day)
    Thanks Received:
    46
    Location:
    Ingerland
    Sucessful run at 1200 core w/1.218v and 1420vram stock volts. Scoring 9779 3DMark11 :nutkick:

    I have pushed the core as far as it will go on Afterburner, so now to tweak the vram to break 10K ;)
     
  13. UbErN00b New Member

    Joined:
    Sep 5, 2012
    Messages:
    257 (0.33/day)
    Thanks Received:
    46
    Location:
    Ingerland
    3DMark11 P9858, in the top 55 of total scores for 7950's on Futuremark :D :toast:
     
  14. james888

    james888

    Joined:
    Jun 27, 2011
    Messages:
    4,540 (3.74/day)
    Thanks Received:
    1,693
    Edit yours posts don't make new posts.
     
    Crunching for Team TPU
  15. UbErN00b New Member

    Joined:
    Sep 5, 2012
    Messages:
    257 (0.33/day)
    Thanks Received:
    46
    Location:
    Ingerland
    Contribute or PM, don't act like a mod.... :slap:
     
  16. james888

    james888

    Joined:
    Jun 27, 2011
    Messages:
    4,540 (3.74/day)
    Thanks Received:
    1,693
    Just a suggestion and I have no authority. I have your thread subscribed because I find it interesting. I get an email everytime someone post. That is why I made the suggestion. Guess I will just unsubscribe and not pay attention.
     
    Crunching for Team TPU
  17. 3870x2

    3870x2

    Joined:
    Feb 26, 2008
    Messages:
    4,875 (2.00/day)
    Thanks Received:
    689
    Location:
    Joplin, Mo
    Congrats on the score.
     
    UbErN00b says thanks.
  18. UbErN00b New Member

    Joined:
    Sep 5, 2012
    Messages:
    257 (0.33/day)
    Thanks Received:
    46
    Location:
    Ingerland
    I know you don't, hence I said maybe a PM might be the better way to go, I am sorry I double posted, though posts were relevant and making different posts with different findings as editing doesn't always have the desired effect. Hope you have enjoyed the bulk of the comments, am at 10K with 1200 core :D :toast:
     
  19. Phusius

    Phusius New Member

    Joined:
    Mar 23, 2012
    Messages:
    1,318 (1.40/day)
    Thanks Received:
    380
    I did not realize the mem and core were interlaced either.

    I may lower my mem down to 1425 and try for 1200 core now. :toast:
     
  20. 3870x2

    3870x2

    Joined:
    Feb 26, 2008
    Messages:
    4,875 (2.00/day)
    Thanks Received:
    689
    Location:
    Joplin, Mo
    Now im really excited to test mine in a couple of days.
     
  21. m1dg3t

    m1dg3t

    Joined:
    May 22, 2010
    Messages:
    2,247 (1.39/day)
    Thanks Received:
    513
    Location:
    Canada
    IIRC mem speed has little to no effect on benchmark scores/overall performance, what i believe you are seeing/experiencing is the limitation/s of the VRM circuitry...

    Nice clocks just the same! :toast:
     
  22. DOM

    DOM

    Joined:
    May 30, 2006
    Messages:
    7,552 (2.46/day)
    Thanks Received:
    828
    Location:
    TX, USA
    why no pics :p

    also 12.11 drivers give a nice boots ;)
     
  23. mediasorcerer New Member

    Joined:
    Sep 15, 2011
    Messages:
    979 (0.86/day)
    Thanks Received:
    225
    Location:
    coast ,melbourne
    Wow huge oc going on with your card, i cant push mine that far, it's ref though, well done!!
    Best i get is 950/1400 tops.
     
  24. Phusius

    Phusius New Member

    Joined:
    Mar 23, 2012
    Messages:
    1,318 (1.40/day)
    Thanks Received:
    380
    Just copied and pasted this and yeah it is stable for me too, I assume 1200 core is better then 1100/1500, I guess I will leave it at 1200/1400 :toast:
     
  25. manofthem

    manofthem

    Joined:
    Jan 9, 2011
    Messages:
    6,101 (4.41/day)
    Thanks Received:
    7,889
    All this talk of overclocking 79xx has started me thinking if finally pushin my cards and see what they can do. They're comfortably sitting at 1050/1500 now, but that's not nearly good enough right?

    As soon as my wife gets off my PC (looking for crap on Craigslist; she has a phone and a laptop, but needs my pc :banghead:), I'm going to reinstall 12.11 and start pushing my cards, hopefully with good numbers.
     
    Crunching for Team TPU

Currently Active Users Viewing This Thread: 1 (0 members and 1 guest)

Share This Page