HP D7054-63006 - `Hot plug` PCI activity LED board - Hot Plug PCI Activity LED Board - Mounts to I/O Tray Retail
HP D9143-69004 - I/O baseboard - Has internal and external SCSI connectors and a slot for the I/O board Retail
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 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