A3639-69314 | Left PCI I/O backplane board – Has six PCI slots – N4000 left PCI I/O backplane board – Has six PCI slots – Mounts vertically in the left side of chassisLeft PCI I/O backplane board – Has six PCI slots – N4000 left PCI I/O backplane board – Has six PCI sl | HP e3000 N4000 (3-way 550-MHZ) | PC BOARD |