No signal detected with GPU/ Works fine without GPU

Lowgdog

Reputable
Jan 30, 2016
2
0
4,510
My part list:
CPU: I-5 4690K
Mobo: ASRock H97M Pro4
RAM: Crucial Ballistix Sport 2x4GB
PSU: Corsair CX600
HDD: Seagate 1TB
SSD: Toshiba OCZ Trion 120GB
Case: Corsair 200R
GPU: Gigabyte GTX 1070 G1 Gaming

I need any help possible as to why the PC works fine without the GPU plugged but the moment its inserted and fitted inside I get no signal on my monitor, I am using an HDMI cord. Also, first time build so any tips are appreciated.