As per the topic, installed the latest drivers from the webpage, followed the instructions. Seems to install successfully (no error messages..), upon reboot my monitors go into power saving mode. Tested with other monitors, same thing. Can't drop to a VT, need to boot into recovery mode to get access to console.
Any ideas? As far as I can tell I'm using precisely the supported setup.
EDIT: Ok! Turns out it had nothing to do with anything, but an issue with a dvi-hdmi adapter. Watch out for those things!