I recently got an Inspiron 660 and am looking to get a AMD 7970 but it says on their website I need a X16 lane and was wondering if I have that or what is the best I could fit on my motherboard for gaming. My Inspiron has a 1 terra-byte hard drive, 8 gigs of RAM, a quad core i5 intel 3 GHz processor for additional information.Thanks I'm new to PC gaming and hardware