No signal to monitor after installing gpu.

Hello,
So i just bought an r9 290x trix from sapphire.
I installed it in my system (i7 3770k, 8gb ddr3,ecs z77h2a2x dlx 2.0,cx 750m) and connected the 8 pin connectors to the gpu in the correct slots.
For some reason when i try to turn on the system , whether it be with the card itself or the integrated graphics, i get no signal, computer turns on, fans spin up bit my monitor says "no signal". I tried reseating the ram, changing pcie slots, installing drivers, disabling drivers, setting pcie gpuin bios as main display but nothing works.

Howerver when i uninstall the graphics card, i can get the system to boot with the integrated gpu.
Any ideas on how to fix this?
Any help will be greatly appreciated.