Re: 180.* graphical corruption and freezes system
i had randomly dead-freeze too (sometimes 3 freeze in 5 mn ! 30 per day i became completely silly), textures corruption, flickering display, hard reboot, nothing with the 177.xx serie...etc... but at the moment i've installed a flash-blocker in mozilla( firefox was always launch with mini 1 flash animation on a tab all the day ex deezer), no more freeze ! one per day max !!
and when i deactivate flash blocker for some flash site - 30 sec and freeze !
hope it can be so simple for you !