HP A6144-69102 - PCI I/O backplane board - Has 12 PCI slots - L3000 PCI I/O backplane board - Has 12 PCI slots - Mounts vertically in the chassis Retail
HP A3639-69315 - Right PCI I/O backplane board - Has six PCI slots - N4000 right PCI I/O backplane board - Has six PCI slots - Mounts vertically in the right side of chassis Retail
HP 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 chassis Retail
HP A4856-69101 - PCI card cage assembly - Includes 12-slot I/O chassis, I/O board, I/O power board, and I/O backplane Retail
HP A4856AX - PCI card cage assembly 3.3/5.0V - Includes 12-slot I/O chassis, I/O board, I/O power board, and I/O backplane Retail
HP P1824-63033 - PCI cage assembly - Has three PCI slots - Includes the PCI backplane PC board and cooling fan Retail
HP A5570-66003 - PCI I/O card backplane - Has four PCI slots, three slots on one side and one slot on the other side Retail
