I can't get it working on Windows 8.1 x64 with P8P67 motherboard. I installed Windows in UEFI mode and even tested it with a small program to be sure SSD supports eDrive and it does! Still it wants to use software encryption. Default BIOS on this motherboard is 2.00.1201 version 2010 and I've upgraded it to 2.10.1208 version 2011 so UEFI 2.3.1 shouldnt be the problem. The drive must be in an uninitialized state. The drive must be in a security inactive state. The computer must be UEFI 2.3.1 based and have the EFI_STORAGE_SECURITY_COMMAND_PROTOCOL defined. (This protocol is used to allow programs running in the EFI boot services environment to send security protocol commands to the drive). The computer must have the Compatibility Support Module (CSM) disabled in UEFI. The computer must always boot natively from UEFI. There is no way to configure CSM and Secure Boot and I have no clue what " uninitialized state" and "security inactive state" means.
... View more