I was recently given a decent PC from a relative who has just upgraded, and I am an amateur when it comes to PC building. It is an alienware Aurora R7. The PC has a gtx 1070, i5-8400, 8 GB of ram. I want to know is it possible to add another graphics card, possibly another 1070, and maybe 8 more GB or ram. Or should I strip those parts and make a new PC?