Tell us which games you're trying to play first of all. For Dolphin, an AMD FX6350 is not all that great, even when OC'ed to 4.0 GHz depending on what game you're running. Some games don't need a lot from the CPU, others do, however.
With a CPU bottleneck, keep in mind that you can't just sacrifice graphical fidelity (which depends on the GPU in Dolphin) and get a speed boost (because the component responsible for graphical fidelity isn't the same component slowing down emulation in that case). It's easy enough to check if you have a CPU bottleneck. Just set your Internal Resolution to 1x and disable all AA. If you still get slowdowns while the GPU is doing minimal work, you have yourself a CPU bottleneck.
The most obvious cures for a CPU bottleneck is to OC (even further in your case) or simply buy a better CPU. Unfortunately, AMD lags behind Intel in single-threaded IPC (which Dolphin relies a lot on for CPU-based performance) and the situation doesn't realistically look to change any time soon. We've done several benchmarks showing the gap between AMD and Intel products if you're interested. Having said that, you still have some room to OC your CPU (which again, may be enough depending on the games you're looking to play, if they aren't terribly demanding in Dolphin) and failing that, even basic Haswell hardware like the i5-4130 can run circles around an AMD FX6350 (and even beats OC'ed 2500Ks and 3570Ks in Dolphin).
With a CPU bottleneck, keep in mind that you can't just sacrifice graphical fidelity (which depends on the GPU in Dolphin) and get a speed boost (because the component responsible for graphical fidelity isn't the same component slowing down emulation in that case). It's easy enough to check if you have a CPU bottleneck. Just set your Internal Resolution to 1x and disable all AA. If you still get slowdowns while the GPU is doing minimal work, you have yourself a CPU bottleneck.
The most obvious cures for a CPU bottleneck is to OC (even further in your case) or simply buy a better CPU. Unfortunately, AMD lags behind Intel in single-threaded IPC (which Dolphin relies a lot on for CPU-based performance) and the situation doesn't realistically look to change any time soon. We've done several benchmarks showing the gap between AMD and Intel products if you're interested. Having said that, you still have some room to OC your CPU (which again, may be enough depending on the games you're looking to play, if they aren't terribly demanding in Dolphin) and failing that, even basic Haswell hardware like the i5-4130 can run circles around an AMD FX6350 (and even beats OC'ed 2500Ks and 3570Ks in Dolphin).