Why isn't my new graphics card working?

So I bought a new graphics card for my PC, fitted it in and when I turned the PC on the fan came on so I know it has power at it, I also bought a DVI-D cable to connect it to the monitor. But yet the monitor is just a black screen and tells me that there is no signal. When I ran the CD that came with the new card (using the old VGA cable for display) it still didn't work, the software was saying that my current graphics card was the AMD A6 (my original cpu) as the PC only had integrated graphics. I feel like I've tried everything from updating system software and driver software to using a display port cable instead and am in dire need of some advice or pointers, thanks.

Specs-

Motherboard - Asus a88xm-a

CPU - AMD A6 dual core (integrated graphics)

1TB memory

4-8GB RAM (can't remember can specify if needed)

The graphics card I am trying to install is Asus Radeon R7360-OC-2GD5-V2