Looking for a power supply



 
Where are you located? What kind of budget are you working with? What are the rest of your system specs?

Too little info to recommend definitively, but typically a CX450/CX450M* from Corsair is sufficient for most people, and pretty affordable.


*Depending on answers to the questions above though, it may or may not be the best option in this instance.
 
No. You have an 84W TDP CPU, and a 120W TDP GPU.
450W is more than sufficient for that system, from a quality PSU (which the CX450 is).

If you were running some no-name fire-hazard junk PSU, you might need to see 550-650W on the label, but those units never actually do anywhere close.