If the RAM and cables are good, first try installing it without the RAID array, if that works you know the RAID controller on your board is bad and you should RMA the board, if it still doesn't work the hard drive controller may be bad, or possibly the actual hard drive. Try a hard drive that you know works.
Cooler Master RC-690 Case | EVGA 780i | Intel Q6600 @ 3.2GHz | EVGA 9800 GX2| WD 500GB 7200RPM SATA | Rosewill Xtreme 850w PSU| Samsung DVD+-RW | 8GB OCZ DDR2-800 | Zalman 9700 HSF| 4 120mm Case Fans| Windows Vista Ultimate 64-bit | Acer 22" using DVI |
3dMark Vantage: 21,544