I don't recommend using a no name PSU especially if it's not 80 plus certified. And especially if you put new hardware under the hood, last thing you want is to damage your brand new CPU, motherboard, or video card. Or get instability while using the PC. Like Onus already mentioned a no name PSU will probably give you only half the power advertised.
Since your FX-8350 and GTX 550-Ti aren't too demanding power wise. I would recommend getting another 450-Watt PSU but from a known brand, like Antec, Corsair, Seasonic, etc... This way you will be sure it will give you enough "stable" power.