Alright this forum just ate my previous, length attempt at posting this. This is the cliffs notes version.
I bought a 6670 video card and Displayport to DVI adapter cable from newegg last month. The video card works great with my old analog cable and the analog-DVI adapter that came with the video card. When I try to use the displayport-DVI adapter (displayport in the video card, DVI in the monitor), I get nothing.
I have been reading that I many need an active adapter. Is this the case? If so why do they even sell these cables?