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"Unless you subscribe to the theory of a second ice age, you’ll know that humans are slowly warming our planet up due to CO2 output. While computers – probably – play a small part in this global change, there is still an impact. Step in 80+ power supplies which promise above 80% efficiency throughout their output wattage range (20%, 50% and 100%). Today I have two such units, both rated @ 500w but from two different manufacturers."
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