Green star series power supply complies with the newest ATX12V Version 2.2 specifications. This includes dual +12V output circuitry that delivers safer and more reliable output to your system’s components, which reduces power consumption by 80% efficiency. Well it can save 300,000 watts one year, and then save your money on your electricity bill. So it includes a 6PIN PCI-E connector (400W-550W) for High-End Graphic card and an 8PIN connector (500W&550W) for Dual core or Multi core CPUs. In addition we’ve included a variety of industrial-grade protective circuitry: OCP (Over Current Protection), OPP (Over Power Protection), OVP (Over Voltage Protection), SCP (Short Circuit Protection).