480909-001 - HP System Board for Dx7400 Desktop 480909-001 - HP System Board for Dx7400 Desktop $141.14
447585-001 - HP 250-Watts Power Supply For Dx7400/ Dx7500 447585-001 - HP 250-Watts Power Supply For Dx7400/ Dx7500 $128.15
447400-003 - HP (Motherboard) for dx7400 Business Desktop 447400-003 - HP (Motherboard) for dx7400 Business Desktop $192.00
ATX0300P5WC - HP 300-Watts 100-127V / 200-240V ATX Power Supply for DX7400 ATX0300P5WC - HP 300-Watts 100-127V / 200-240V ATX Power Supply for DX7400 $156.40