If you have the option of two US$29.99 PSU's like the following:
Powmax 480W ATX Power Supply PSDE480
and
ALLIED 300w Pentium 4 / AMD Power Supply - ATX
Which one would you get? I mean, the 300w and lower are really old technology, the 480w has dual ball bearing fans, one 120mm and one 80mm... talk about much lower noise, voltage overload protection and SATA connectors.
See my point? It's not just the wattage, it's the technology... why get the a PSU that already failed in your system again? A newer PSU obviously is going to be more reliable and with all those features virtually free, you're already prepared for future upgrades. A 480w PSU is not going to increase your energy bill if it is in the same system
