First of all, before proceeding to the OS Installation, update your BIOS using the Recovery Mode - Latest Bios Version V0091
Copy the bio file to a fat-formatted usb memory stick
Remove the bios jumper from the board.
Connect the usb stick on the target machine.
Make sure there is no other usb devices connected on the system
Switch on the system
Wait for the bios update to complete.
Put back the bios jumper to its normal position
Try to boot the machine.
Once the bios has been updated, double-check if this was done successfully by checking the bios version
in the bios.
Are you using the onboard RAID SATA Controller?
If yes, reconstruct the RAID using the Intel Matrix.
Then proceed to OS installation.
If failed again,
try another OS CD version 32bit as well
try with only one memory module.
try on a single different HDD model.
remove any other external card if you have.
Let me know how it goes.
I will think onwards.