GPU doesn't let me POST


I just got a new build. I've built pcs before but never really on my own. So this was my first real time.

Things are fairly smoothly except for the fact that the pc didn't POST with the GPU in. I took the GPU out, and it POSTed. I don't get what the problem is...

Anyways, here are the specs (nothing is OCed yet)

CPU: Intel Core i5 2500k 

Mobo: Asus P8Z77-V lk

RAM: G.Skills Ripjaws 1866 CL9 *GB

PSU: NZXT Hale82 750W 80Plus Bronze

GPU: Sapphire HD 7950

SSD: Adata SX900 128GB

Cooler: Corsair H80


I got this build mainly for gaming so I can't stand not having a GPU for another day longer. Any help would be appreciated.  



make sure it is in all the way and you have both the pci power cables attached and make sure you have you moniter plugged in the video card not the motherboard if that does not work you may have got a doa card

Either the card is DOA or its not getting the power it needs.