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Thread: HD 6950 Crossfire issues

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    HD 6950 Crossfire issues

    So I today i received another XFX HD 6950 DD from scan for a crossfirex config with my existing card. My power supply is a TX750 and so provides enough power to the cards. However, after I set up the cards and installed all the necessary divers (and switched it to crossfire mode in CCC), I played some BF3 to try it out and the fps was no different, or maybe slightly worse than if I was running just the one card. Please help as I hope I haven't just wasted £160 in another GPU.

    Regards
    Ollie

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    Re: HD 6950 Crossfire issues

    Would check that you have a profile setup for BF3 and crossfire is enabled in there. Also have you got the latest drivers?

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    Re: HD 6950 Crossfire issues

    Are you using the latest crossfire profiles?
    http://sites.amd.com/us/game/downloa...-profiles.aspx

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    Re: HD 6950 Crossfire issues

    The profiles do not seem to appear under application profiles.

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    Re: HD 6950 Crossfire issues

    What CPU do you have?

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    Re: HD 6950 Crossfire issues

    AMD Athlon II X4 935

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    Re: HD 6950 Crossfire issues

    I think you may have a CPU bottleneck. Easy way to tell is to lower the graphic detail in a 64-player game and see if FPS improves. If it doesn't make much difference, it's your CPU.
    Society's to blame,
    Or possibly Atari.

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    Re: HD 6950 Crossfire issues

    Quote Originally Posted by Phage View Post
    I think you may have a CPU bottleneck. Easy way to tell is to lower the graphic detail in a 64-player game and see if FPS improves. If it doesn't make much difference, it's your CPU.
    Yes, the FPS increases vastly on low detail, over 100%. So you you think it is a processor? What AMD CPU would you suggest. A Bulldozer, phenom, or wait for piledriver?

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    Re: HD 6950 Crossfire issues

    No sorry, that sounds like your GPUs are not functioning correctly. If you lower graphics and FPS increases then the hold up is in the GPU not the CPU.
    Reading the entries above it would appear that you haven't installed the CAPS part of the software driver. Is that correct ? You can trell by going to the Control Panel, Uninstall software page, then looking to see if "Application Profiles" are listed with the little red/silver icon like Catalyst.
    If not, you need to download them from here, and install them to get CF working. (links to W7 64-bit version)
    http://sites.amd.com/us/game/downloa...n_win7-64.aspx
    Society's to blame,
    Or possibly Atari.

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    Re: HD 6950 Crossfire issues

    Ok, so I have downloaded and installed teh CAPS, but it is nothing is showing up under the application profiles menu.
    Screenshot:
    upload images

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    Re: HD 6950 Crossfire issues

    No they won't. The CAPS set default (factory) setups for individual games. Those profiles in CCC are for when you want to change the default profiles to a personal setup and save it.
    Society's to blame,
    Or possibly Atari.

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    Re: HD 6950 Crossfire issues

    Score without CF: P4311: http://3dmark.com/3dm11/3698312
    Score with CF: P5958: http://3dmark.com/3dm11/3698241
    So is it battlefield causing the problem?

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    Re: HD 6950 Crossfire issues

    Looks like it. Very similar to the other thread here.
    http://forums.hexus.net/help-quick-r...but-where.html
    Society's to blame,
    Or possibly Atari.

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    Re: HD 6950 Crossfire issues

    Update:

    Furmark score with CF: http://www.ozone3d.net/benchmarks/fu...e.php?id=69472
    Furmark score without CF: http://www.ozone3d.net/benchmarks/fu...e.php?id=69474

    So CF is definitely working as it just about, but I guess it is just struggling with BF3 for some reason.

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    Re: HD 6950 Crossfire issues

    BUMP
    Any more ideas?

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    Re: HD 6950 Crossfire issues

    Have you tried a fresh install of win7 with the latest drivers?

    I ran into some trouble when I was CF'ing my 6950s. CCC did not allow me to select the CF mode. I tried to wipe the AMD drivers off and install them again, but it didn't help, so I reinstalled the OS and everything was fine afterwards.

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