What isn't performing as well as you'd like?
The upgrade may or may not make the difference you seek. Personally, I suspect it would, but I tend to leave more applications open, which would benefit from the additional cores. The FX-6300 is Piledriver, the FX-4130 is Bulldozer. Piledriver has a higher IPC, and you're also gaining another module. What motherboard do you have? If it is suitable for overclocking, you can get even more out of either chip.