PC Won't boot properly

So I swaped out my motherboard and CPU and everything seems to be working but i get no display from the graphics card that I know works. However my motherboard which is a Z270 ASrock Extreme 4, has its blue lights fade in and out repeatedly. I tried looking it up but can't find anything about it being an error. Case and CPU fans are all working. Reseated everything and cleared the CMOS.

Full Specs
Case: Phanteks Enthoo Pro
CPU: I7-7700K
Motherboard: ASrock Extream 4 Z270
GPU: GTX 1080 TI FE
RAM: Corsair Vengeance LPX DDR4 3200
Cooler: Noctua NH-D15