1. Why did you get a 6600k and h170. k cpu's go with z170 mobos. A k cpu will go with h170 but u cant overclock it it so it's pointless
2. As I said the best solution is to rebuild the pc again do it slower and more carefully with this
https://www.youtube.com/watch?v=0bUghCx9iso video.
3. Check every power and data connector (before you rebuild, not to waste time if it was a fixable mistake)
4.Check the case power switch connector (before you rebuild, not to waste time if it was a fixable mistake)