Monitor has no signal after installing new GPU

[MarkJr]

So yeah, my r9 290 DD edition arrived today, I plugged it in, turned on the PC, and my monitor gets no signal.. Anyone know a solution? My specs are:
AMD FX-6300
GeIl Black Dragon 8GB 4x2 sticks
R9 290 DD edition
Mobo: gigabyte 970A-DS3P
Help?!

 

[MarkJr]

I forgot to plug in the 8-pin hahahah, thank you for your help