KENTEK 400W 400 Watt ATX Replacement Power Supply for HP Bestec ATX-250-12Z, ATX-300-12Z, ATX-300-12Z CCR by 115V, 230V switchable power supply (International compatible) Ball bearing fan High energy efficiency Compatible with ATX 12V 2.3/EPS 12V, 115/230V AC input technology Over Current Protection (OCP) Over Power Protection (OPP) Over Voltage Protection (OVP) Short Circuit Protection (SCP) Single Fan design