This is just my experience - I have no answers
I'm in the process of building a system
MB - GA-890GPA-UD3h rev 1
Memory   4x2GB  Corsair Dominator DDR3    1333 PC3 10666    CMD8GX3M4A1333C7  
(So we have almost the exact same setup)
When I first attempted to boot, it wouldn't even post.
After Gigabyte support asked what beep codes I had, I grabbed a case speaker off an old
machine, and found that I was getting 3 long beeps.     Gigabyte couldn't actually say that
3 long beeps means memory problem, but they pointed me that way.  
I started pulling memory and trying the different sticks in the slot closest to the CPU.
I immediately started getting the computer to post.  So I thought that I had a bad stick.
Yet, I also tried putting all the sticks back in, and it worked???    
This, of course, sounds like a seating problem.   But I don't buy that.  I'm very careful that
I snap memory all the way in.    So what happened??   Your guess is as good as mine.
I just know but I suspect either very fickle memory or very fickle MB.
Sorry that I'm no help.   Since my advice is to just keep reseating the memory until it works.