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http://www.antec-inc.com/pdf/manuals/truepower_us.pdf

Your TruePower power supply can also monitor and control the system case fan speed. There are two dedicated fan connectors marked Fan Only from the power supply for system case fans. You may connect your case fans to them and have the TruePower circuitry control the speed of the case fans.

Note: Please do not connect more than three external fans to the Fan Only connectors in any combination. For maximum cooling you may choose to connect the case fans to the regular 4-pin peripheral connectors, but in this fashion noise will not be reduced.

若沒用別打偶...