Hi. It's a Zebronics 450W psu. Is that good enough?The wattage is good. As a number. But it highly depends on the psu. There's a lot of cheap knock-off psus out there that will claim that wattage, and blow if you try over 50% loads. A decent quality psu will be more than good for 450w, a piece of junk, no.
I recommend that you go with the cheapest 450W 80+ Bronze EVGA, SeaSonic, or Corsair psu. I don't know where you are, but in the states the EVGA BT 450W and the Seasonic S12III 450W are both about $40 USD. A powersupply is not something that you want to cheap out on at all.
While this is a poor quality PSU, as rightfully noted by the others, it should still be sufficient to power your current system.