快速信道互联（英语：Intel QuickPath Interconnect，缩写：QPI），是一种由英特尔开发并使用的点对点处理器互联架构，用来实现芯片之间的互联。英特尔在2008年开始用QPI取代以往用于至强、安腾、桌面型平台以及大部分行动型平台的处理器的前端总线（FSB）。初期，英特尔给这种连接架构的名称是「公共系统界面」（Common System Interface ，CSI），它的早期设计形态亦被称为Yet Another Protocol（YAP）和YAP+。

英特尔在发布Sandy Bridge-EP核心（Romley平台）后，也顺势公布首代QPI的改进版QPI 1.1版本。

The Intel QuickPath Interconnect (QPI) is a point-to-point processor interconnect developed by Intel which replaced the front-side bus (FSB) in Xeon, Itanium, and certain desktop platforms starting in 2008. Prior to the name's announcement, Intel referred to it as Common System Interface (CSI). Earlier incarnations were known as Yet Another Protocol (YAP) and YAP+.