The Xigmatek X-Calibre series power supplies are built upon three premises: Quality, Performance and Value. The XC series is a 115V/240VAC input power supply with greater than 75% power efficiency under typical loads. Stable and clean power is delivered through dual +12v outputs with OVP, OPP, OVP over-surge protection. Quality design and construction provides 100,000 hours MTBF