Computer specs help

[ShinyCharizard]

Okay good thing I realized to upgrade the psu before I ordered it. I'll probably upgrade the computer eventually when I have some extra money, either later this year or early next year.

The website says that I will only need the 450w for these specs, any idea why?

The specs you have chosen have low power requirements. However getting the larger power supply will come in handy when you need to upgrade parts. Other then that everything looks to be good