H81i-PLUS

Hello and thank you for reading as I could REALLY use some help right now... so I just got a Intel i7-4790k cpu and I put it into my current pc switching out my old i5-4430. When I started the pc up, everything turned on in the computer, but neither my monitor or my mouse and keyboard detected...

This is what I have in mind currently: http://secure.newegg.com/WishList/PublicWishDetail.aspx?WishListNumber=34271748 With shipping and all that, it's close to $500. It's for my grandma, but I wanted to get a bit nicer to last longer - I can get the keyboard, mouse, monitors, CD drive, etc...