I picked up this computer about four years ago:
http://www.amazon.com/dp/B0084C368O/?tag=neogaf0e-20
It's got the following specs:
3.4 GHz Core i7-3770
8 gigs DDR3 sdram
1024 GB SATA 3 7200 rpm
RADEON HD6850
I mostly use it for gaming, though a lot of that isn't graphically intense (mobas, hearthstone). I feel like I'm starting to feel the strain on newer games. Overwatch runs fine, Battleborn stutters on some maps, and single player games have been a mixed bag. I suspect I'd have trouble with Dark Souls 3, for example.
I'm trying to decide if I can salvage a few more months or years with some cheaper upgrades, probably a better gpu primarily, or if I should just get a new rig entirely, but I've not looked at hardware in years. Any thoughts from the more well informed here would be appreciated.