A PSU doesn't need to have good electrical performance - transient response, voltage and load regulation, ripple, hold up time, doesn't need to last long, and doesn't need to be safe to operate to have high efficiency. There are many Bronze power supply that are higher quality than Gold ones.
Efficiency should only be a concern if electricity bills are a concern.
What people should be looking for is the quality of the power supply, by reading proffesional reviews such as https://www.kitguru.net/components/power-supplies/aris-bitziopoulos/be-quiet-system-power-u9-700w-psu-review/
kitreyes4321 reacted to Rexper in Need help to choose PSU?
