Here are the specs for the NH-D15.
Check your dimensions.
http://noctua.at/en/nh-d15/specification
Noctua has introduced some "s" suffix coolers which are offset to eliminate conflicts with ram and graphics cards in the first slot.
Really, there is no processor that fits a Z170 motherboard that requires a NH-D15.
A NH-U12s will cool anything well.
If you can, I would exchange the D15 for a smaller unit.