nolanoconnell2 :
I believe its an evga bronze 450 watt. it isnt too much trouble to upgrade just wondering.
For future reference, when someone asks for the exact model, they mean the actual model number, not just the brand. EVGA makes at least 3 different 450W bronze power supplies. All of which vary in quality.
Depending on the model in question, you may be fine, although I wouldn't recommend overclocking the RX 580. Instead, look into undervolting the RX 580 (which is a good idea regardless).