Glossary term
PCIe (Peripheral Component Interconnect Express)
The standard interface connecting GPUs and storage to servers; the PCIe 5.0 to 6.0 transition is underway.
PCIe (Peripheral Component Interconnect Express) is the standard interface connecting GPUs, storage, and other components to a server's CPU and motherboard. Each generation roughly doubles bandwidth, and the PCIe 5.0-to-6.0 transition is currently underway to keep pace with accelerator demands. PCIe sits inside the server, complementing the cluster-level networking that links servers together. See Networking & Optical 101.