Example: Battlefield 4 on high in the 45-55FPS range with FX6300 + R9 270.
Slap a good cooler on it and overclock it a bit. 4.4 GHz - 4.5 GHz is easily reachable on near stock voltage with something like a Cooler Master Hyper 212 EVO.
Also use good ram, low latency DDR3 1600 or 1866.