I too have consitently been getting an error message about a Raid failure. And like you there is no problem with the drives. In the past two months I had one problem with the drives but other then that is like a false alarm. I suspect it may be driver related as even Nvidia control panel reports the drives as heathly after each raid failure message. I have messed with voltages and bios setting without effect. The machine has been stable with mild overclock but I have spent days trying to "stablize" the system from the raid failure message without success. I have now just learned to ignore the message and just wait for new drives in hope of a fix.