Trenton’s BPG6615 PCI Express backplane has a 14-slot form factor that enables 4U rackmount computer designs that can support a single or dual-processor PICMG 1.3 single board computer, five PCI Express and six PCI-X/PCI standard plug-in I/O cards. Typical dual-processor SBCs used with this backplane include the BPX7059 and JXT6966 while single-processor boards include the TSB7053 and TQ9. The x16 PCIe card slot on the BPG6615 PCI Express backplane is driven with a x16 electrical interface link direct from the SBC. The remaining four x8 PCIe slots available on the backplane are driven with x4 links from a 24-lane PCI Express switch. The PCIe switch also provides a x4 link that drives the dual-channel PCIe-to-PCI-X bridge which interfaces the PCI-X/PCI option card slots to the system’s single board computer.