Try to turn off UEFI, does the DSS boot into Architecture selection of 64bit mode?
If so try to select the"Tab" key on "Architecture selection" screen then
press "Tab" button at the screen at the build for the 64 bit mode during booting
and modify the line that contains different parameters by changing the splash=silent to splash=verbose.

This will show more info in the boot process. If none of this applies and during the POST operation and not the DSS boot process
then try to turn off all management features in the BIOS and you might change positions of the RAID card to different slot.