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Why does skyrim lag with crossfirex even with 11.11b?

Ok. So I just bought another gigabyte amd radeon hd 6670 1gb card. It hyper crossfires BUT, skyrim lags like hell when I put both together. But if I run just one, it works like a charm. I've tried renaming it to Fallout3.exe, tried 11.11, 11.11b and 11.11c but none of them work either. I've even tried the alt+tab trick but that doesn't work. PLEASE HELP!
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More about skyrim crossfirex
  1. 11.12?
  2. What are the other parts of your system?
  3. Best answer
  4. 12.1a preview is the latest
    http://support.amd.com/us/kbarticles/Pages/Catalyst121apreviewdriver.aspx
    though there shouldnt be any skyrim improvements in it over 12.1 previews...

    and 11.12 cap2 is the latest app profile available...
  5. thanks a lot. My rig is 2x AMD Radeon hd 6670 1gb, core 2 quad 2.4 ghz 8gb ddr3 ram x48c platinum edition msi motherboard. I'll try out the 12.1a and see if that works. Cheers! :/
  6. Best answer selected by BrendanMatt.
  7. oh and I have windows 7 ultimate 64bit os :)
  8. Umm... It made it REALLY bright, light flickering all of the time and still just as laggy. Any more suggestions?
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