GPU Lagging Frames

So, I just installed a 8400gs with my 7970 to run a second monitor and now everything I do is lagging. When I play BF3 everything is fine but every minute or so I can't move and then I start moving a few seconds later. It's like it's putting a delay on everything. What's happening?
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  1. Best answer
    7970 with 8400GS is like 2 different Worlds !

    Just run your Second monitor from 7970, Don't game with that 2nd monitor.
  2. Best answer selected by melikepie.
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