6950 CrossfireX performance issues

Discussion in 'Videocards - AMD Radeon' started by manneblask, Dec 29, 2011.

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  1. manneblask

    manneblask Member

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    GPU:
    Sapphire Radeon 2GB CF
    Hi.
    I just went from one single 6950 2gb to 2 in CF. And my performance is awful. And the gpu load doesnt even hit over 60 on the first card, and not even over 10 on my other card.
    It's properly installed, 12.1 Preview drivers, 11.12 CAP 1. Did a total uninstall, driversweeped and installed everything. Still getting god awful performance. Mainly play BF3 and i get around 30-50 FPS during intense combat.

    Any help here would be really useful.

    This is what my GPU-Z is showing:

    http://i44.tinypic.com/ere4uf.jpg

    My rig:
    Mobo: Asus Crosshair Formula IV
    CPU: AMD Phenom II 970 BE X4 @ 3500MHz
    CPU Heatsink: Arctic Cooling Freezer Xtreme Rev. 2
    RAM: Corsair Dominator 8GB DDR3 @ 1333MHz
    GPU: Sapphire Radeon HD 6950 2GB DDR5 @ 800/1275MHz CrossfireX
    PSU: Corsair Professional Series HX850W
    HDD: WD 1TB @ 7200rpm
    Chipset: AMD 890FX
    Case: Fractal Define R3
    OS: Windows 7 Ultimate x64
     
    Last edited: Dec 29, 2011
  2. ---TK---

    ---TK--- Ancient Guru

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    GPU:
    2x 980Ti Gaming 1430/7296
    Its your CPU. It ok for 1 card but 2 high end cards will be bottlenecked. Your only really viable option is to get a 2500k z68 sli xfire MB. If your ram is 1.5-1.6v you can use that.
     
  3. Kinfa

    Kinfa Master Guru

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    GPU:
    XFX R9 380 4GB
    Before you go to the computer store to buy new motherboard and processor try to run GPU dependant benchmark (Unigine) and monitor gpu usage for both cards with MSI Afterburner. With my rig GPU usage is about 98% at both cards.

    [​IMG][/URL][/IMG]

    This is my result, your should be way better, of course.
     
    Last edited: Dec 29, 2011
  4. manneblask

    manneblask Member

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    GPU:
    Sapphire Radeon 2GB CF

    My CPU is the problem? Are you joking? Can't see what that has to do with the GPU load, but still I'm not the expert here I guess.
    I have a few friends who uses the 960 and the 980 with CF 6950 and 6970 without any issues that I have.
    Not gonna change platform entirely, thats out of the question.
     

  5. manneblask

    manneblask Member

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    I'm gonna run some tests on Unigine too check too. Thanks for the tip.
     
  6. Saad

    Saad Master Guru

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    GPU:
    Amd Radeon 6970 crossfire
    while bf3 is running try minimizing the game and then returning to fullscreen..that fixes the problem for me...(yes i have an i5 2500 @ 5ghz and sometimes i get the EXACT same problem as op..its some stupid crossfire issue)
     
  7. Kinfa

    Kinfa Master Guru

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    GPU:
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    The truth is, for Crossfire two 6950's you need fast CPU for better CF scaling, but in your case it might be some other issue. If gpu load in unigine is low, then CPU is not the problem. Anyway, you should overclock CPU.
     
  8. Agent-A01

    Agent-A01 Ancient Guru

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    GPU:
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    If your cpu usage is 90%+ in task manager while playing bf3, you have a cpu bottleneck. Either upgrade or OC as much as you can
     
  9. manneblask

    manneblask Member

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    Thanks for all the help, im gonna try your tips. Anyone who got any good advice in OC'ing. I've tried messing with the cpu multiplier but havn't got it stable at all.
     
  10. Kinfa

    Kinfa Master Guru

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    Yes, I tried logging cpu usage in BF3 SP with Aida, cpu is about 95% at all cores during intense fight, but gpu load is not at 10%. It is about 50-60%. BF3 needs fast CPU. Try some other games. You have overclocking guide in AMD cpu section in G3D forum.
     

  11. manneblask

    manneblask Member

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    GPU:
    Sapphire Radeon 2GB CF
    My result in Unigine:

    [​IMG]

    I monitored it with RadeonPro, and the gpu load seemed to be around 80-90%
    So I might have to OC my cpu then?
     
    Last edited: Dec 29, 2011
  12. Agent-A01

    Agent-A01 Ancient Guru

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    Yep. What cooler do you have
     
  13. manneblask

    manneblask Member

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    GPU:
    Sapphire Radeon 2GB CF
    Arctic Cooling Freezer Xtreme Rev. 2
    Im at about 45c in full load and 33 in idle.

    Really need some easy tricks for OC'ing my CPU, i've tried looking in the endlessly long OC'ing thread but its a bit much for me :p
     
  14. manneblask

    manneblask Member

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    Just OC'd my CPU to 4Ghz, still the exact same problem. Watch this screenshot:
    [​IMG]

    Should I just give up? My cpu isnt enough for CrossfireX?
     
  15. ---TK---

    ---TK--- Ancient Guru

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    running heaven is fine but thats a gpu HEAVY benchmark. if you do not want to change platforms oc that cpu to at least 4ghz, 3.5ghz is a very low clockspeed and will bottleneck them cards. the other guy killed your score and you have faster video cards
     

  16. manneblask

    manneblask Member

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    I OC'd mine to 4GHZ too. Watch the screenshot above. Still the same low fps, this is everything on medium with no AA, HBAO, SSAO.
    And no, I dont feel like getting a new mobo + cpu that MAYBE will solve my problem. That is plus the money i spent on the new 6950 + PSU.

    So i will rather get rid of my 6950 and use the singe setup for now, which gave me better performance than the Crossfire setup.
     
  17. ---TK---

    ---TK--- Ancient Guru

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    would definitely increase your fps going Intel 2500k. I can guarantee that as I upgraded from a sk 775 qx9650 4ghz which is about the same as a p2 at 4ghz. Oc that chip to 4ghz it will help. I can't help u with oc ur CPU as my last amd was sk 939 when they were the best. Run that bench at 1680x1050 like the other Guy. Yours was at a higher resolution. Didn't see that before
     
    Last edited: Dec 29, 2011
  18. Agent-A01

    Agent-A01 Ancient Guru

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    40fps on medium? Thats pathetic. I would have 200+ fps on those settings. Do you get same fps in SP?
     
  19. manneblask

    manneblask Member

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    Yeah same in SP, when i use my single 6950 i would get about 50ish on that location in medium settings i think.
     
  20. Agent-A01

    Agent-A01 Ancient Guru

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    Well i doubt its cpu then. Probably to do with drivers
     
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