So I'm not particularly the most knowledgable guy when it comes to computer hardware. I was given an Alienware Aurora R4 for a birthday a few years ago and never bothered to replace parts and only opened it to do some cleaning, but recently I decided to upgrade graphics cards and I got a GTX 970 superclocked. Everything seemed fine putting it together, but when I startup the computer it will go to the BIOS screen and beep 3 times and won't respond to anything I do. Any help in this would be greatly appreciated.