i used to have a HD6970 with a tripple monitor set-up, two monitors connected with DVI-D cables, and the third one with an ACTIVE displayport to DVI adapter.
Now that i've changed my gfx to a 680 GTX, and trying the same set up, the third monitor is not detected at all, i've read that there was issues with 680 and DP on 301 drivers, im running 306, is this issue still present, or is there any other source for the problem?
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Are you connecting to the 3rd display directly with a DP cable or via an adapter?
"and the third one with an ACTIVE displayport to DVI adapter. "