Graphics card problem

I have recently bought a new graphics card, an xfx r7 260x. The problem is though that the card doesn't seem to work. The fans spin on it, som it's not completely dead.  My old even shittier card works though, so there it's anything wrong with the motherboard. I have uninstalled all old drivers. The card just doesn't seem to give any signal, and I dont know what I can do more than return it to fix the problem.

So any tips of what I might have done wrong or should I just return it?

What card were you using before? 

The old one is a hd5770


Its not any driver problems or anything?