What is next after DDR5?

By: Doug S (foo.delete@this.bar.bar), April 5, 2021 6:57 am
Room: Moderated Discussions
David Hess (davidwhess.delete@this.gmail.com) on April 4, 2021 8:45 pm wrote:
> This also means that the external overhead of ECC is greater going from 64/72 to 32/40,
> but maybe the internal organization is different for the mandatory internal ECC.


Given that full ECC for DDR5 will (at least) double the ECC DIMM price penalty I wouldn't be surprised to see some using DDR5's internal ECC as an excuse to drop board support for it. Fewer customers will demand it due to the higher cost, and marketing will be telling those customers "its built into the DIMMs now, you don't need ECC except at the extreme high end".

Less demand for it will mean those ECC DIMMs have an even greater price penalty above the 25% raw cost than DDR4 ECC is above the 12.5% raw cost, which is why I should "at least" above.

DDR5's internal ECC is 128 bits wide, so the bit penalty is kept pretty low.
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        What is next after DDR5?Brett2021/03/26 04:39 PM
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      What is next after DDR5?Brett2021/03/27 04:27 PM
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        What is next after DDR5?Andrey2021/03/30 09:09 AM
          What is next after DDR5?David Hess2021/04/04 08:52 PM
      What is next after DDR5?David Hess2021/04/04 08:45 PM
        What is next after DDR5?Doug S2021/04/05 06:57 AM
          What is next after DDR5?David Hess2021/04/05 10:45 AM
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            Same costDavid Hess2021/04/05 08:26 PM
            Same costMaxwell2021/04/06 07:17 PM
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                This STILL has NOTHING to do with the eDRAM. I am talking about the SRAM LLC---2021/04/09 01:40 PM
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      5nm the end of DRAM?wumpus2021/04/07 09:10 AM
        5nm the end of DRAM?Robert Williams2021/04/07 11:05 AM
    Totaly misunderstanding of DDR SDRAM memory interfaces and DRAMHeikki Kultala2021/04/07 12:36 PM
      Totaly misunderstanding of DDR SDRAM memory interfaces and DRAManonymou52021/04/07 01:13 PM
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