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AMD EPYC 9755 DDR5-4800 vs. DDR5-6000 Memory Performance

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  • AMD EPYC 9755 DDR5-4800 vs. DDR5-6000 Memory Performance

    Phoronix: AMD EPYC 9755 DDR5-4800 vs. DDR5-6000 Memory Performance

    With the newly-launched AMD EPYC 9005 series processors continuing to use Socket SP5, there is drop-in upgrade compatibility for existing EPYC 9004 series motherboards/servers. That's assuming, of course, the vendor provides a BIOS update for enabling the EPYC 9005 series "Turin" support and there may be limitations on the maximum CPU/TDP supported given power/thermal constraints. But in going from EPYC 9004 to EPYC 9005 is also upping the maximum memory speed from DDR5-4800 to DDR5-6000 (or DDR5-6400 in validated configurations). For those trying to weigh the benefits of also upgrading your memory if on an existing EPYC 9004 Genoa/Bergamo server to DDR5-6000, here are some memory performance comparison benchmarks for some reference points.

    Phoronix, Linux Hardware Reviews, Linux hardware benchmarks, Linux server benchmarks, Linux benchmarking, Desktop Linux, Linux performance, Open Source graphics, Linux How To, Ubuntu benchmarks, Ubuntu hardware, Phoronix Test Suite

  • #2
    Hello I really wanna see benchmarks with 6400

    is it possible to get the validated config?

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    • #3
      I guess I'm rather surprised there's not a more stark difference. However, one thing we don't know is just how many of these benchmarks scale to so many cores/threads, in the first place. Without knowing that, it's hard to reach any firm conclusion from this data.

      Another thought I have is that most of these CPUs will be deployed as VM hosts. Even for benchmarks that don't scale to so many cores, you'd probably see much better scaling by having M instances each running 128/M cores. In this sense, SPEC2017_rate=N are arguably better benchmarks, since they run N instances of each benchmark. Perhaps overly-pessimistic, but they definitely will highlight memory throughput!

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      • #4
        AMD really crushing it lately, not sure why any datacenter customer would choose Xeon right now.

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