PCIe InterconnectsPCIe has become an ubiquitous expansion bus solution within the server architecture. Now PCIe is emerging from the motherboard and leaving the "box". System engineers looking to interconnect subsystems can now connect them with PCIe. For example, two servers can now be connected with PCIe at 64 Gbps. Servers can now be connected to an external rack filled with PCIe peripherals, such as video processing gear.