0950-3790 - HP 650-Watts DC External Power Supply for D3xx 0950-3790 - HP 650-Watts DC External Power Supply for D3xx $74.36
0950-2229 - HP 650-Watts 5V 130A DC to DC Converter Module Power Supply 0950-2229 - HP 650-Watts 5V 130A DC to DC Converter Module Power Supply $306.93