The Antec TruePower TP-650 operates at a continuous 650 watts. Each of the four 12 volt rails can operate constantly at 22 amps while having an over-current protection set at 40 amps. Even though the TP-650 is powerful, it is still highly efficient thanks to its 80 PLUS Bronze certification. A hybrid modular cable system (yes the cables are included) allows you to use only the cables you need thus improving air flow and reducing clutter. And do not worry yourself about what connectors you might need because the Antec TruePower TP-650 comes with just about every connector known to computers!