Editing PCI Express (section)

=== Cluster interconnect ===
Certain [[data-center]] applications (such as large [[computer cluster]]s) require the use of fiber-optic interconnects due to the distance limitations inherent in copper cabling. Typically, a network-oriented standard such as Ethernet or [[Fibre Channel]] suffices for these applications, but in some cases the overhead introduced by [[routing|routable]] protocols is undesirable and a lower-level interconnect, such as [[InfiniBand]], [[RapidIO]], or [[NUMAlink]] is needed. Local-bus standards such as PCIe and [[HyperTransport]] can in principle be used for this purpose,<ref name="YUum6" /> but {{as of | 2015 | lc = on}}, solutions are only available from niche vendors such as [[Dolphin Interconnect Solutions|Dolphin ICS]], and TTTech Auto.