The new Signature Series from Antec is a premium power supply line, which means that products from this series so far 650 W and 850 W models were launched have tighter specs. For example, voltage regulation is set at 3 percent instead of 5 percent 7 percent instead of 10 percent for the -12 V output. Between the lines the manufacturer says this line has a very high efficiency, although on the specs table they list efficiency as 80 percent minimum. Signature 650, also known as SG-650, features a half modular cabling system and only one 80-mm fan, which the manufacturer says is quieter than other 80-mm solutions.
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