alexoiu :
Try setting SATA to IDE in BIOS. If still no go, try reinstalling Windows.
I was having this exact issue with my new i7, Asus Maximus Hero VII, G. Skill RAM install. After much frustration and about to buy a new SDD for a fresh install I tried changing to IDE in BIOS and it worked!! Thanks so much! You saved me money and heart ache. lol!
Now time to install my r9 290 finally!-) Tom's Hardware is the best! Thank you