The FSP Hydro PTM PRO ATX3.1 1650W is the ultimate power supply for the performance requirements of the next generation of hardware. With the updated ATX 3.1 specifications, this power supply offers the most stable and cost-efficient performance with the highest energy efficiency. The HYDRO PTM Pro series is characterised by extremely tight voltage regulation so that the output voltage is less than +/- 1% with a 10% load change, giving you the highest efficiency and voltage stability. The fully modular design simplifies installation and allows you to use only the cables you need to create a neat, clean overall look. When the Eco button is switched on, the power supply runs with lower power consumption and is whisper quiet. The power supply's fan does not run when the power supply is less than 30% utilised to ensure quiet operation. OVP (Over Voltage Protection), UVP (Under Voltage Protection), OCP (Over Current Protection), OPP (Over Power Protection), SCP (Short Circuit Protection) and OTP (Over Temperature Protection) provide a complete protection circuit that protects your hardware.