Do you hear specific flicks of HDD (like system is loading) when you run your system? If you don't, check again 8-pin power cable and make sure XFX pluged properly.
Oh, and reset BIOS of your PC.
It's been a long time since I've ordered my Alienware Aurora R3, which was back in 2011 and after 5 long years having her the graphics card is finally starting to see it's time plus it's simply time for an upgrade. Now I bought a XFX RX 480 graphics card at Best Buy as I had a few recommendations for it. So I was like okay I'll give it a go and at that price point I couldn't decline it especially it being the last one there. So I carried onto getting it.
Unfortunately I am having problems even getting this to work with my system. I shut the computer completely down, uninstalled the old graphics card and removed all the drivers for that card as well, and then installed the new card, plugged everything in and then tried powering the desktop back on. The card powers on, the Desktop powers on, but no sign of the computer even starting up. Nothing is happening on my monitor and I made sure all the connections were secure as well. I have no idea what else to do. Is this card even compatible with my system at all?
Intel Core i7-2600 (8MB Cache) Overclocked Turbo Boost to 3.9GHz
12GB Dual Channel DDR3 at 1333MHz
2TB ( 2x 1TB) SATA II (3Gb/s) 7,200RPM (2 x 32MB Cache)
Matte Stealth Black Alienware Aurora w/ 875W Multi-GPU Approved PSU