HP - A7231-66530 - I/O Backplane Board 4-Slot PCI RX2600 RP34XX A7231-66530 - HP - 4 Slot PCI I/O Backplane Board for RX2600 / RP34XX Server $123.90 $105.00
HP - 233961-001 - PCI Backplane Board ML530 233961-001 - HP - ML530 PCI Backplane Board $85.42 $72.39
HP - 395688-001 - Backplane Board PCI RP5000 395688-001 - HP - PCI Backplane Board for RP5000 $69.38 $58.80