Antecs best-selling power supplies now with two fans standard SmartPower has long been the smart choice for system builders, offering the best value in a quality power supply. SmartPower 2.0 meets ATX12V v2.01 standards, with dual+12V rails and 4 serial ATA connectors, and features Antec's unique dual fan hybrid design for virtually silent operation. SmartPower 2.0 power supplies carry UL, CUL, TÜV, CB, FCC Class B, CE and CB approvals. European models also carry CE, and CCC.