Issue on initial boot of a new system

So I recently went to upgrade some parts in my build and decided to go with some more expensive components than I did the previous time. I upgrade my motherboard to an Asus Z170 sabertooth S (the arctic camo one) with an i7 6700k. For ram I went with 2 8GB corsair dominator platinum sticks at 3000mhz. The board is indicating to me now that it's a ram issue however, I was able to successfully get the computer to show an image one time off of one of the single 8 gig sticks. Haven't been able to get it to even show anything on the screen let alone go into post or anything since that one try, have yet to even see the bios. The board is indicating that the dram is the issue by LED on the board but I don't seem to understand why exactly that is the problem if I was able to successfully get the computer to sense it one time. I'm relatively new to the pc building scene so if you can explain whats happening in relatively beginner friendly terms that would be great.