as from by experience with 1155 mobos, closing cpu bracket is a scary experience, because everything creaks and looks like its going to break any second, dont worry its normal...
about Lucid, install lucid drivers and just plug in hdmi into the MOTHERBOARD, dont put anything into gpu. Check if it works by going into some game like crysis you will know for sure if it works or not.
Heard that in Z77 and ivy bridge cpu`s, performance is actually increased when using Lucid... that isnt the case with sandy so I stopped using it, since actually it dropped few fps in games and hdmi dont support my 120hz 3d monitor.