The PCI express link design of the BPX3/14 backplane supports PICMG 1.3 server-class SHBs. The fourteen PCI-X slots support 64-bit/133MHz and 64-bit/100MHz option cards. PCI express slot PCIe1 is a x16 mechanical slot driven with a x4 electrical link and the PCIe2 slot is a x8 mechanical slot driven by a x4 electrical link delivered to the card slot via an IOB31 module installed on the SHB. The backplane features four PCIe-to-PCI-X bridge chips for reliable and secure data communications between the PCI-X card slots and the PICMG 1.3 SHB. The backplane’s available power connector options simplify the system’s power wiring.