Genuine 571889-001 408544-005 HP Workstation xw9400 DDR2 SDRAM 6 Core System Motherboard Compatible Part Numbers: 571889-001, 408544-005 Guaranteed HP Genuine Part Number 571889-001 Type: Motherboard CPU Socket: Socket F 1207 / Compatible With: HP XW9400 Workstation **Ship within 24 hours except holidays and weekends**