The BPX6719 PCI Express backplane is a small form factor PICMG 1.3 backplane that supports a single or dual-processor single board computer, one x16 and one x8 PCI Express slot driven x8 PCIe links and an additional x8 PCIe slot driven with a x4/x1 PCIe link. All of these PCIe links are direct interfaces from the single board computer. The BPX6719 also features one 64-bit/133MHz PCI-X and two 64-bit/100MHz PCI-X option card slots that are driven with a dual-channel PCIe-to-PCI-X bridge chip. The PCI-X slots can support universal PCI I/O cards.