can't start Windows 8.1 at all everytime it gives BSOD no matter IDE or AHCI
The User Manual I downloaded mentions something about a DVD for support but it only refers to XP, Vista and W7, so perhaps there are some newer versions you should be looking for. Ask ASUS?
http://www.asus.com/us/support/Download/1/42/1/4/ITjeO1wq0nRUPfej/41/
Also looks like there have been a lot of BIOS updates. Check yours?
Good luck
Robert