after a day in hell, this is what I have to report to fellow z77 xtreme4 users with double raid zero arrays... if you experience shut downs during window load and / or are unable to install windows (7 or 8) because installation phase ends with an error during "file expanding" phase... Stick to / revert to bios 1.40 (and better don't install intel stuff for the mobo, especially if windows device manager doesn't report errors). Simple as that. Bios versions 2.70 and 2.80 in particular mess up with the intel sata controller, at least based on my experience. on a sidenote... if you have an OCZ ssd and at some point it becomes unformatable / unpartitionable under windows administrative tools... take a deep breath and make an OCZ bootable CD with OCZ TOOLBOX. Boot from that CD while your disk is connected internally (SATA) as the only one is your system and then perform a "secure erase" on the ssd (it lasts a few secs only). You will save the ssd. Forget the freeware "low level" format utilities. They will only make things worse and may end up irreversibly bricking your expensive ssd.