The Trenton BP2S6929 is a two-segmented PICMG 1.3 backplane that is designed to support graphics-class System Host Boards such as the Trenton TQ9 board. The backplane can also support server-class SHBs such as the Trenton MCX-series. Each SHB segment on the BP2S6929 supports three x16 PCIe mechanical slots driven with x8 PCI Express electrical links from the segment's PCI Express fan-out switch. Each segment also includes four 64-bit/100MHz PCI-X card slots. A PCIe-to-PCI-X bridge chip is used to provide a 64-bit/100MHz PCI-X interface to the PCI-X card slot in each SHB segment.