Dell offers an extra efficient power supply (PSU) with some products, such as their Optiplex 9010,which I'm considering buying.
They say it's 90% efficient but don't explain exactly what that means or how it compares to the standard. Maybe the standard is 89% efficient, I dont' know.
And the link for "help me decide" is broken.
So I'm wondering what the energy savings % is in standby and full power mode). (From that I can easily calculate my ROI/ Payback period).