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 A5191-69102 - PCI I/O backplane board - Has 12 PCI slots - L1000/L2000 PCI I/O backplane board - Has 12 PCI slots - in the chassis Retail
