• Rugged/mil 3U VPX Carrier Board
• VPX Backplane Fabric Interface with Support for up to Four (4)  PCIe x4 Ports per VITA 46.3 and 46.4
• PCI Express Revision 2.0 with Backward Compliance to PCIe 1.1
• Configurable for Switch Operation Supporting up to Four (4) PCIe Ports per VITA 46.20 Profile SLT3-SWH-4F-14.4.4
• PMC Site Supports 64-bit 66/133 Mhz PCI-X and 33/66 Mhz PCI
• XMC Site Supports PCIe x8
• PMC/XMC I/O Routed to VPX P2
• 64 PMC I/O Signals
• 35 Single Ended and 20 Differential XMC I/O Signals
• No Need for Software Drivers
• OpenVPX Compliant
• Conduction- and Air-cooled Versions
• Vibration and Shock Resistant

http://www.rugged.com/aitechs-rugged-3u-vpx-products-reduced-swap-ideal-compact-computing-systems