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DDR5 memory coming
  • Rambus now has working prototypes of DDR5 , the next major interface for DRAM dual in-line memory modules (DIMMs). The register clock drivers and data buffers could help double the throughput of main memory in servers, probably starting in 2019 — and they are already sparking a debate about the future of computing.

    The Jedec standards group plans to release before June the DDR5 spec as the default memory interface for next-generation servers. However, some analysts note it comes at a time of emerging alternatives in persistent memories, new computer architectures and chip stacks.

    “To the best of our knowledge, we are the first to have functional DDR5 DIMM chip sets in the lab. We are expecting production in 2019, and we want to be first to market to help partners bring up the technology”

    DDR5 is expected to support data rates up to 6.4 Gbits/second delivering 51.2 GBytes/s max, up from 3.2 Gbits and 25.6 GBytes/s for today’s DDR4. The new version will push the 64-bit link down to 1.1V and burst lengths to 16 bits from 1.2V and 8 bits. In addition, DDR5 lets voltage regulators ride on the memory card rather than the motherboard.

    CPU vendors are expected to expand the number of DDR channels on their processors from 12 to 16. That could drive main memory sizes to 128 Gbytes from 64 GB today.

    The DDR5 standard will arrive about the same time Jedec releases its NVMDIMM-p interface for memory modules supporting a mix of DRAM and persistent memory. Intel said it will roll out server DIMMs next year using its 3D XPoint chips.

    A lot of people don’t think DDR5 will be the next-generation memory interface. Process technology shrinks for DRAMs are approaching the physical limits of its core capacitors, leading experts to project the end the memory designs in five to ten years. Higher error rates are already requiring correcting code circuitry on the chips.

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  • Hynix announced that it’s developed a 16GB DDR5 memory chip t- first to match the upcoming JEDEC standard for DDR5.

    It must be noted that DDR5 memory uses less power while offering faster speeds than today’s DDR4 memory. SK Hynix says mass production isn’t scheduled to begin until 2020.

    16GB SK Hynix memory solution supports data transfer speeds up to 5200 Mbps, which makes it about 60 percent faster than DDR4 memory, which supports speeds up to 3200 Mbps.