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In computing, Direct Media Interface (DMI) is Intel's proprietary link between the northbridge and southbridge on a computer motherboard. It was first used between the 9xx chipsets and the ICH6, released in 2004. Previous Intel
Intel
chipsets had used the Hub Interface to perform the same function, and server chipsets use a similar interface called Enterprise Southbridge Interface (ESI).[1] While the "DMI" name dates back to ICH6, Intel
Intel
mandates specific combinations of compatible devices, so the presence of a DMI interface does not guarantee by itself that a particular northbridge–southbridge combination is allowed. DMI shares many characteristics with PCI Express, using multiple lanes and differential signaling to form a point-to-point link. Most implementations use a ×4 link, while some mobile systems (e.g. 915GMS, 945GMS/GSE/GU and the Atom N450) use a ×2 link, halving the bandwidth. The original implementation provides 10 Gbit/s (1.16 GB/s) in each direction using a ×4 link. DMI 2.0, introduced in 2011, doubles the data transfer rate to 2 GB/s with a ×4 link. It is used to link an Intel
Intel
CPU
CPU
with the Intel
Intel
Platform Controller Hub
Platform Controller Hub
(PCH), which supersedes the historic implementation of a separate northbridge and southbridge.[2]:14 DMI 3.0, released in August 2015, allows the 8 GT/s transfer rate per lane, for a total of four lanes and 3.93 GB/s for the CPU–PCH link. It is used by two-chip variants of the Intel
Intel
Skylake microprocessors, which are used in conjunction with Intel
Intel
100 Series chipsets;[3][4] some low power (Skylake-U onwards) and ultra low power (Skylake-Y onwards) mobile Intel
Intel
processors have the PCH integrated into the physical package as a separate die, referred to as OPI (On Package DMI interconnect Interface)[5] and effectively following the system on a chip (SoC) design layout.[6] 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.[7] Implementations[edit] Northbridge devices supporting a northbridge DMI are the Intel 915-series, 925-series, 945-series, 955-series, 965-series, 975-series, G31/33, P35, X38, X48, P45 and X58. Processors supporting a northbridge DMI and, therefore, not using a separate northbridge, are the Intel
Intel
Atom, Intel
Intel
Core i3, Intel Core i5, and Intel
Intel
Core i7 (8xx, 7xx and 6xx, but not 9xx). Processors supporting a northbridge DMI 2.0 and, therefore not using a separate northbridge, are the 2000, 3000, 4000, 5000 and 6000 series of the Intel
Intel
Core i3, Core i5 and Core i7. Southbridge devices supporting a southbridge DMI are the ICH6, ICH7, ICH8, ICH9, ICH10, NM10, P55, H55, H57, Q57, PM55, HM55, HM57, QM57 and QS57. PCH devices supporting DMI 2.0 are the Intel Z68, P67, H67, H61, Q67, Q65, B65, HM65, HM67, QM67, QS67, Z77, Z75, H77, Q77, Q75, B75, X79, HM75, HM76, HM77, UM77, QM77, QS77, H81, B85, Q85, Q87, H87, Z87, H97, Z97, C222, C224, C226, X99, and H110.[8] PCH devices supporting DMI 3.0 are the Intel Z170, H170, HM170, Q170, QM170, Q150, B150, C236, CM236, C232, and C620. [9][10][11][12][13][14][15][16][17][18] The Intel
Intel
200 series chipsets featuring socket LGA 1151 also support DMI 3.0. The Intel
Intel
300 series chipsets featuring socket LGA 1151 also support DMI 3.0. [19] See also[edit]

List of device bit rates

References[edit]

^ " Intel
Intel
5520 Chipset and Intel
Intel
5500 Chipset Datasheet" (PDF). Intel. March 2009. Retrieved 2014-11-06.  ^ "Desktop 3rd Generation Intel
Intel
Core Processor Family, Desktop Intel Pentium Processor Family, and Desktop Intel
Intel
Celeron Processor Family: Datasheet - Volume 1 of 2" (PDF). External Design Specification (EDS). Intel. November 2013. Retrieved 2014-01-28.  ^ Ian Cutress (2015-08-05). "The Skylake CPU
CPU
Architecture – The Intel
Intel
6th Gen Skylake Review: Core i7-6700K and i5-6600K Tested". AnandTech. Retrieved 2015-08-06.  ^ Ian Cutress (2015-08-05). " Intel
Intel
Skylake Z170 Motherboards: A Quick Look at 55+ New Products". AnandTech. Retrieved 2015-08-06.  ^ Ganesh T S (2016-05-09). "Choosing the Right SSD for a Skylake-U System". AnandTech. Retrieved 2016-11-16.  ^ Gennadiy Shvets (2014-06-26). "More details on Skylake processors". cpu-world.com. Retrieved 2014-07-01.  ^ Cutress, Ian (9 March 2015). " Intel
Intel
Xeon D Launched: 14nm Broadwell SoC for Enterprise". AnandTech. AnandTech. Retrieved 18 June 2015.  ^ " Intel
Intel
H110 Chipset ( Intel
Intel
GL82H110 PCH)". Intel
Intel
ARK (Product Specs). Retrieved 28 January 2016.  ^ " Intel
Intel
Z170 Chipset ( Intel
Intel
GL82Z170 PCH)". Intel
Intel
ARK (Product Specs). Retrieved 28 January 2016.  ^ " Intel
Intel
H170 Chipset ( Intel
Intel
GL82H170 PCH)". Intel
Intel
ARK (Product Specs). Retrieved 28 January 2016.  ^ "Mobile Intel
Intel
HM170 Chipset ( Intel
Intel
GL82HM170 PCH)". Intel
Intel
ARK (Product Specs). Retrieved 28 January 2016.  ^ " Intel
Intel
Q170 Chipset ( Intel
Intel
GL82Q170 PCH)". Intel
Intel
ARK (Product Specs). Retrieved 28 January 2016.  ^ "Mobile Intel
Intel
QM170 Chipset ( Intel
Intel
GL82QM170 PCH)". Intel
Intel
ARK (Product Specs). Retrieved 28 January 2016.  ^ " Intel
Intel
Q150 Chipset ( Intel
Intel
GL82Q150 PCH)". Intel
Intel
ARK (Product Specs). Retrieved 28 January 2016.  ^ " Intel
Intel
B150 Chipset ( Intel
Intel
GL82B150 PCH)". Intel
Intel
ARK (Product Specs). Retrieved 28 January 2016.  ^ " Intel
Intel
C236 Chipset ( Intel
Intel
GL82C236 PCH)". Intel
Intel
ARK (Product Specs). Retrieved 28 January 2016.  ^ "Mobile Intel
Intel
CM236 Chipset ( Intel
Intel
GL82CM236 PCH)". Intel
Intel
ARK (Product Specs). Retrieved 28 January 2016.  ^ " Intel
Intel
C232 Chipset ( Intel
Intel
GL82C232 PCH)". Intel
Intel
ARK (Product Specs). Retrieved 28 January 2016.  ^ " Intel
Intel
Z370 Chipset". 

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Technical and de facto standards for wired computer buses

General

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Standards

SS-50 bus S-100 bus Multibus Unibus VAXBI MBus STD Bus SMBus Q-Bus Europe Card Bus ISA STEbus Zorro II Zorro III CAMAC FASTBUS LPC HP Precision Bus EISA VME VXI VXS NuBus TURBOchannel MCA SBus VLB PCI PXI HP GSC bus InfiniBand UPA PCI Extended (PCI-X) AGP PCI Express
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PC Card ExpressCard

Embedded

Multidrop bus CoreConnect AMBA Wishbone SLIMbus

Interfaces are listed by their speed in the (roughly) ascending order, so the interface at the end of each section should be the

.