I had an Asus Striker Extreme and I am going to RMA it because the RAID array cannot be configured to be drive 0 - it is always the LAST hard disk.
Therefore, the OS drive can never be C: if you are RAIDing it, and if you put another HDD in, the whole machine will often fail to boot if it decides to make a different disk Drive 0.
Talked to Asus and they wondered why I thought that was a bad thing.
Never buying asus again...