Micron today announced its next generation of NVDIMM-N modules that combines a DDR4 DRAM with NAND flash memory, in what is commonly called persistent memories.
The new 32GB modules double the capacity of Micron’s previous NVDIMM-Ns and increase the speed to DDR4-2933 CL21, faster than the support of current server platforms.
Micron announces 32GB NVDIMM-N DDR4 memories
Micron NVDIMMs are N-type, which means that they function as usual ECC DRAM DIMMs, but have NAND flash for backup data in case of power loss. That is different from the type of NVDIMM-F memory that offers ‘pure’ flash storage.
How does an NVDIMM-N memory module work?
During normal system operation, Micron NVDIMMs only use the DRAM as if it were a standard DDR4 memory. When the system experiences a power failure or indicates that one is imminent. Also, the FPGA of the on-board module is responsible for managing the storage of the contents of the DRAM in the SLC NAND flash of 64 GB of the blade.
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During a power outage, the module can go up through a cable to an AGIGA PowerGEM external capacitor module. Or you can use a backup battery supplied through the 12V pins of the DIMM slot.
Micron is currently introducing the new 32GB NVDIMM but did not indicate when they will be available for sale.
Also, this type of memories will even come with 3D XPoint modules in the future.