First thing, DO what DM said, ... there's a good chance this will produce a more positive result!........He's helped me no end!
Second, I've just been through a similar exercise but with a Revodrive x2 as a boot drive! so there might be some similarities.
Third, Google the living hell out of ( GA-X58A-UD3R with LSI MegaRAID SAS 9240-4i SAS controller) start of being specific and depending on how many hits you get ...you might end up with GA-X58 with MegaRaid or SAS, ... you might find someone who already done it!
If not......Make a big pot of coffee and.........
Take out every non essential USB appliance you can except the coffee warmer , you may need it.
If you need pre-install drivers make sure there already lok and loaded!
If you have an older PS2 mouse/keyboard, use it ... if not... Oh well! Take out ALL drives except the SAS card......If possible, the drives you intend to use , ... pre-format prior to installation and start with these connected the SAS card ...do a full cold boot with everything connected we just talked about..........reboot to BIOS and hit "load optimized defaults/save and reboot back to BIOS......config BIOS to how you think it should be and try AHCI......usually important for SSD or PCI cards to work correctly ..........save and boot..........F12 to boot from install media and cross your fingers...........this should give you the next best chance after what DM said.
Aussie Allan