I'm not sure if it's time for an upgrade or not, most of my games are playable on high, but I do not get stable 60fps, sometimes I get as low as 20fps. I'm thinking it might be the graphics card but not really sure.
Specs are,
CPU: i7-4790K "stock"
HEATSINK: Cooler Master Hyper 212 Evo
MOBA: Asus Maximus VII Formula
RAM: 32GB Corsair Dominator 1866MHz DDR3
GPU: R9 290X Lightning "stock"
PSU: Corsair RM850X
SSD: Samsung 850 Evo 256GB
Titles I play are ARK, Assassins Creed Unity, Fallout 4, Gold Rush The Game, Star Citizen, Space Engineers.