HyperCloud Memory (HCDIMM) is a
DDR3 SDRAM
Double Data Rate 3 Synchronous Dynamic Random-Access Memory (DDR3 SDRAM) is a type of synchronous dynamic random-access memory (SDRAM) with a high bandwidth (" double data rate") interface, and has been in use since 2007. It is the higher-speed ...
dual in-line memory module (DIMM) used in server applications requiring a great deal of memory. It was initially launched in 2009 at the
International Supercomputing Conference
The ISC High Performance, formerly known as the International Supercomputing Conference, is a yearly conference on supercomputing which has been held in Europe since 1986. It stands as the oldest supercomputing conference in the world.
History ...
by
Irvine, California
Irvine () is a Planned community, master-planned city in South Orange County, California, United States, in the Los Angeles metropolitan area. The Irvine Company started developing the area in the 1960s and the city was formally incorporated on ...
, based company,
Netlist Inc. It was never a JEDEC standard, and the main server vendors supporting it were
IBM and
Hewlett Packard Enterprise
The Hewlett Packard Enterprise Company (HPE) is an American multinational information technology company based in Spring, Texas, United States.
HPE was founded on November 1, 2015, in Palo Alto, California, as part of the splitting of the H ...
.
Technical
HCDIMM is a 240-pin, 72 bit-wide, load reduced, DDR3 SDRAM dual in-line memory module (DIMM). According to
Cirrascale, "while LRDIMM requires a special BIOS configuration, HyperCloud provides seamless plug-and-play operation with past, current and future generations of
Intel
Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 seri ...
processors."
The logic function embedded into the register device and the isolation devices used on the HCDIMM performs rank multiplication and load reduction functions which allows the system to increase its performance and access high capacity memory modules. The register device "re-drives the command, address and clock signals" from the host memory controller to the DRAM chips and presents four physical ranks of memory as two virtual ranks to the memory controller on the processor.
Rank multiplication allows maximum memory densities on each server memory channel while the isolation device makes four DRAM appear as one to the memory controller. This reduces the electrical load all while allowing high density DIMMs to run at high speeds.
HCDIMM has a lower bit-to-bit data skew and latency due to its distributed architecture by having multiple isolation devices between the DRAM and data bus.
References
{{Reflist
External links
Netlist HyperCloud Memory
Computer memory