horrible system, for that price, even without the insane price markup the company does, you you could build an intel based system for a fraction of the cost and get the same or better performance.
That CPU is just a factory overclocked FX-8350 Which even when pushed to 5GHz, struggles to keep up with a non overclocked core i7 3770k (and is still when it comes to general computing and gaming by a stock 3070k. Even at high clock speeds, the 8350 does not reach the single threaded performance of a stock 3770k and so for games and applications not taking full advantage of 8 threads, you still end up with sub par performance.
Only difference is with the fx-9590, you are spending nearly 3 times the price the less performance, twice the power consumption, and still have sub par single threaded performance.
If you can afford to spend $900 on a CPU, then go and buy a core i7 3939k for $300 less (which will be faster in both single threaded and multithreaded performance at stock speeds (with room to overclock) than the FX-9590 which is already pretty much at the max it can handle.
The way you tell when a CPU has reached it's max overclock is when you start to get exponential increases in power consumption with relatively little additional clock speeds.