Rambus presented a set of components that will allow the production of MRDIMM-12800 and RDIMM-8000 memory

Rambus has announced the release of sets of SMD electronic components necessary for the production of new generation RDIMM and MRDIMM RAM modules for servers. The kits include clock generators, power management drivers, and some other components.

Image source: VideoCardz

The set presented by Rambus included the following main components:

  • The industry’s first 5th generation Registering Clock Driver (RCD), allowing RDIMMs to operate at 8000 MT/s;
  • Multiplexed Register Clock (MRCD) and Multiplexed Data Buffer (MDB) allowing future MRDIMMs to operate at speeds of up to 12,800 MT/s by doubling DIMM throughput beyond the native speed of the DRAM device;
  • Second generation server power management chip (PMIC5030) designed for DDR5 RDIMM-8000 and MRDIMM-12800 memory modules, delivering ultra-high current at low voltage to support higher memory speeds and more DRAM and logic chips per module.

The set of components for the production of RDIMM-8000 and MRDIMM-12800 server memory also includes Serial Presence Detect Hub (SPD) chips and a temperature sensor (TS).

Image Source: Rambus

Rambus explains that the DDR5 MRDIMM-12800 uses a new module design that improves data transfer rates and system performance by multiplexing two ranks of DRAM, effectively interleaving two data streams. This allows the host memory bus to operate at twice the data rate of native DRAM devices, thereby increasing throughput while using the same physical DDR5 RDIMM connections. This requires an MRCD chip that can address the two DRAM ranks on alternate clock cycles, as well as MDB chips to direct data flow to and from the correct DRAM chips. Each DDR5 MRDIMM-12800 module requires one MRCD and ten MDB chips for memory channel multiplexing. MRCD and MDB will also support Tall MRDIMM form factor with four ranks of DDR5 DRAM to double the capacity of dual-rank RDIMM.

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