I got the cable from a store deemed reputable here in Portugal, and I've had no issues with this cable until now, and I've been using it for almost a year. It is, however, a DP to miniDP cable, as mentioned on the topic you posted, which worries me somewhat.
Unfortunately, I have no other DP devices I can use to test if I fried something or not.
And what I meant was that the display won't show up on the nVidia control panel, unless it's plugged into this last, and currently, only working, DP.