i found these Using ATA Security eXtension BIOS to add hard drive password protection | The Silicon Underground SSDs and built-in encryption–and how to enable it | The Silicon Underground Intel’s and Sandforce’s AES-128 encryption is useful, but not for what you think | The Silicon Underground quote from those "In his own documents concerning ssd 320 series intel clearly speaks not about BIOS but ATA device password. There is no mechanism to secure mass storage drive by BIOS password. But ATA specification offers per drive password. Bios of your motherboard should support such feature. Most of desktops do not, big pile of notebooks do." so the the original broblem is that z77 extreme 4 bios don't support ata-password at the moment.