In computing, the Live Media Interface ( DMI ) is Intel's link between the northbridge and southbridge on the computer's motherboard. It was first used between the 9xx and ICH6 chipsets, released in 2004. The Intel chipset has previously used the Hub Interface to perform the same functionality, and the server chipset uses a similar interface called the Enterprise Interface Southbridge (ESI). While the name "DMI" dates back to ICH6, Intel mandates the specific combination of compatible devices, so the presence of a DMI interface does not guarantee by itself that certain northbridge-southbridge combinations are allowed.
DMI shares many characteristics with PCI Express, using multiple paths and differential signals to form point-to-point links. Most implementations use ÃÆ'â € "4 links, while some mobile systems (eg 915GMS, 945GMS/GSE/GU and Atom N450) use the ÃÆ'-2 link, halving the bandwidth. The initial implementation provides 10 Gbit/s (1.16 GB/s) in each direction using the ÃÆ' â € "4 link.
DMI 2.0 , introduced in 2011, doubled the data transfer rate to 2 GB/s with links ÃÆ' â € "4. It was used to connect Intel CPUs with Intel Platform Controller Hub (PCH), which replaced the implementation historic from the northbridge and a separate southbridge.
DMI 3.0 , released in August 2015, allows 8a, GT/s per line transfer rates, for a total of four lines and 3.93Ã, GB/s for CPU-PCH links. It is used by two Intel Skylake microprocessor chips, which are used in conjunction with the Intel 100 Series chipset; some low power (Skylake-U onward) and ultra low power (Skylake-Y so on) Intel mobile processor has PCH integrated into the physical package as a separate die, referred to as OPI (In DMI Package Interconnect Interface) and effectively follow the system layout on the chip (SoC). On March 9, 2015, Intel announced Broadwell-based Xeon D as the first enterprise platform to fully incorporate PCH in SoC configuration.
Video Direct Media Interface
Implementations
Northbridge devices that support DMI northbridge are Intel 915-series, 925-series, 945-series, 955-series, 965-series, 975-series, G31/33, P35, X38, X48, P45 and X58.
Processors that support DMI northbridge and, therefore, do not use separate northbridge, are Intel Atom, Intel Core i3, Intel Core i5, and Intel Core i7 (8xx, 7xx and 6xx, but not 9xx). Processors that support northbridge DMIÃ, 2.0 and, therefore, do not use separate northbridge, are 2000, 3000, 4000, 5000 and 6000 series from Intel Core i3, Core i5 and Core i7.
Southbridge devices that support DMI Southbridge are ICH6, ICH7, ICH8, ICH9, ICH10, NM10, P55, H55, H57, Q57, PM55, HM55, HM57, QM57 and QS57.
PCH devices that support DMI 2.0 are Intel Z68, P67, H67, H61, Q67, Q65, Q65, Q77, Q75, Q75, Q77, Q75, Q75, Q75, Q77, Q77, Q75, B75, X79, HM75, HM76, HM77, UM77, QM77, QS77, H81, B85, Q85, Q87, H87, Z87, H97, Z97, C222, C224, C226, X99, and H110.
PCH devices that support DMI 3.0 are Intel Z170, H170, HM170, Q170, QM170, Q150, B150, C236, CM236, C232, and C620. The Intel 200 series chipset featuring the LGA 1151 socket also supports DMI 3.0. The Intel 300 series chipset featuring the LGA 1151 socket also supports DMI 3.0.
Maps Direct Media Interface
See also
- List of device bit rate
References
Source of the article : Wikipedia
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