Don't use the term 'heard'.
Newer gen games are using 6 to 8 cores now thanks to PS4/XBO multi core architecture.

Take a look at gamegpu.ru (russian website, it has benchmarks on most recent games with core loading).
Most games on 2014 are utilization 4-6 cores.

EDIT : If you're planning to upgrade from FX4300, jump to FX6300 or FX8320.
The FX6350/8350 are the same version with slightly higher frequencies which can be match easily with FX6300/FX8320 via multiplier adjustment but with more power draw



This post has been edited by shakku: Jun 25 2014, 12:16 PM

No... don't get me wrong. FX6350 is always better than FX6300 at stock speeds.
But if both overclocked, they're not too far apart.