Question about my new desktop.

So about a week ago I purchased an Inspiron 3656 from best buy. It was an open box so I got it for like $599.99 which is a great deal. I went ahead and put a 480 gig SSD in it and made the 2 terabyte that came with it external. I cannot find much info about the motherboard that it comes with so. Am I able to put a faster CPU in this machine? It has 4 cpu cores and 8 gpu cores. It says it has a AMD Radeon r9 360. The cpu is a quad core FX8800P r7 i believe. Is it possible to put in an 8 core and faster one? Or even any faster cpu? The computer is plenty fast but my work is paying for it. I love the machine and tinkering around makes me want to build an all out gaming rig even though I don't play my ps4 haha.