Direct Media Interface

In computing, Direct Media Interface (DMI) is Intel's proprietary link between the northbridge (or CPU) and southbridge (e.g.

DMI is essentially PCI Express, using multiple lanes and differential signaling to form a point-to-point link.

The DMI provides support for concurrent traffic and isochronous data transfer capabilities.

It is used by two-chip variants of the Intel Skylake microprocessors, which are used in conjunction with Intel 100 Series chipsets;[7][8] some low power (Skylake-U onwards) and ultra low power (Skylake-Y onwards) mobile Intel processors have the PCH integrated into the physical package as a separate die, referred to as OPI (On Package DMI interconnect Interface)[9] and effectively following the system on a chip (SoC) design layout.

[10] On 9 March 2015, Intel announced the Broadwell-based Xeon D as its first enterprise platform to fully incorporate the PCH in an SoC configuration.

[11] In 2021, with the release of 500 series chipsets, Intel increased the amount of DMI 3.0 lanes from four to eight, doubling the bandwidth.