I could not locate any PS information on Packard Bells website
I was really surprised to hear they are still in business. They pulled out of the US market a long time ago and I have not heard them mentioned once until now. I was a technician for them many years ago.
If you need a new power supply get at least a 650w. I'm sure you'd like to upgrade your gpu at some point in the future , like when the higher , more power hungry cards come down in price !