I have the following question:

I´ve got the board "ASUS Maximus" and two of the 160 GB SAT2 WD1600YS fixed disks. I want to create a RAID0. When I set the RAID in BIOS and reboot the computer, it freezes at the begining of the start monitor. Only when I pull the SATA cables it will reboot. Where is the mistake? Who can help me? I spoke with the ASUS support and they told me that my power supply unit with 500 Watt is not enough. I should buy me a 800 Watt power supply unit. Is this possible?