DDR5 Memory

Discussion in 'Memory' started by micsway123, Oct 14, 2021.

  1. micsway123

    micsway123 Member

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    New kits dropping soon for 12th Gen Intel.

    https://videocardz.com/press-release/g-skill-announces-trident-z5-ddr5-memory-up-to-6400-mt-s

    You will be able to get three memory frequency configurations for the new Trident Z5s, ranging from 5600MHz to 6000MHz, and 6400MHz. Each frequency can be configured with either CL40 timings or faster CL36 timings. All kits will come in a 32GB (2x16GB) dual channel kit configuration.

    Worldwide availability will start sometime in November of this year.

    Price TBC

    Absolute speeds seem off the market with today's 3800c14 standards:
    3800Mhz CL14 = 7.37ns
    6400Mhz CL36 = 11.25ns

    Sure perhaps some people here will have fun overclocking these :)
     
    Last edited: Oct 14, 2021
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    micsway123

    micsway123 Member

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  3. dasa2

    dasa2 Member

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    That is about equal in latency to 3200c18. But possibly double the bandwidth.
     
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    micsway123

    micsway123 Member

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    right so double the bandwidth at half the speed. same same.

    3200c16 would have a higher effective throughput?
     
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    micsway123

    micsway123 Member

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  6. Hotrod2go

    Hotrod2go Member

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    If history is anything to go by, mobo bios updates will obviously refine these results. Meh.. sticking with DDR4.
     
  7. hippyhippy

    hippyhippy Member

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    Is there actual real world performance gain?
     
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    micsway123

    micsway123 Member

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    The specs look slower than current some DDR4 speeds (3800c14 for example). Testing will show it there is some other benefit not known yet.
     
  9. Phido

    Phido Member

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    I expect AMD vcache will be attractive to those with big memory configurations, until DDR5 drops in price.
    However, the first gen of the new format often has very similar speeds to the high spec last gen. DDR3/4 was the same. As was DDR2/3.
    If you have a high 3000 to 4000mhz memory kit I would imagine DDR5 doesn't offer a huge uplift right now.
     
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  10. hippyhippy

    hippyhippy Member

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    This somehow reminded me of that whole rambus saga...

    Is there any idea of the real world performance gain of ddr4 over ddr3? Since we are coming to the end of the ddr4 life cycle.
     
  11. Phido

    Phido Member

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    DDR4 got faster. but on launch its was a much muchness.

    New formats are more about enabling future performance, rather than completely mind blowing initial spec performance.

    DDR3 1600 12800MB/s
    DDR3 1866 14933MB/s
    DDR3 2133 17066MB/s
    DDR4 1600 12800MB/s
    DDR4 2133 17066MB/s
    DDR4 2400 19200MB/s
    DDR4 2666 21333MB/s
    DDR4 3200 25600MB/s
    DDR4 3600 28800Mb/s
    DDR4 4000 32000Mb/s
    DDR5 4800 38400MB/S
    DDR5 6400 51200MB/S

    So going from DDR4 4000Mhz to DDR5 4800Mhz would be a small incremental improvement. 6400 or faster would be much better.

    Vcache murkys this, because you get a ~20% increase..
    If you have Some fast ram 3200Mhz or faster, then being able to drop in a Vache CPU will narrow the DDR4/DDR5 difference.

    Much the same as AMD with with the K6-2+. it was able to come pretty close to the pentium bus speed in interger stuff.
     
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    micsway123

    micsway123 Member

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    It’s Linus but still a good run down of what’s new. no benchmarks.

     
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    micsway123

    micsway123 Member

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  14. Slavetonet

    Slavetonet Member

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  15. PJDeane

    PJDeane Member

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    Can't wait to do exactly what I did with DDR4 and not buy it for a year until it stops being on par with the ram I already have ‍♂️
     
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  16. Phido

    Phido Member

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    DDR5 will definitely have its day. But usually its one or two speed bins above the entry speed.
    Also processors and cache will need to become optimized for it to really take advantage.

    This will of course launch with new platforms. PCI5.0. So there will be multiple areas with improved bandwidth.
     
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    micsway123

    micsway123 Member

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    finally got some DDR4 vs. DDR5 benchmarks thanks to HWU, results are up and down depending on the game and on average nothing between them:

    upload_2021-11-5_14-48-28.png

    upload_2021-11-5_14-48-52.png

    upload_2021-11-5_14-49-4.png
    upload_2021-11-5_14-49-14.png
    upload_2021-11-5_14-49-26.png
    upload_2021-11-5_14-49-37.png

    non gaming DDR5 pulls ahead in most cases:

    upload_2021-11-5_14-50-54.png
    upload_2021-11-5_14-51-9.png
    upload_2021-11-5_14-51-20.png
    upload_2021-11-5_14-51-30.png
    upload_2021-11-5_14-51-39.png upload_2021-11-5_14-51-57.png

    source:
     
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    micsway123

    micsway123 Member

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  19. Phido

    Phido Member

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    As expected ALU/interger performance goes through the roof. No change on FPU benchies. Gaming - mixed back.
    5950x with 128Mb cache bumping its interger/ALU up ~20% will be attractive drop in for some people.

    It is expected AMD would see simular increases when it switches to ddr5..

    But yet they should cut prices.
     
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    micsway123

    micsway123 Member

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    some DDR4 vs. DDR5 comparisons here from der8auer

    upload_2021-11-8_20-26-32.png

    latency tests the most interesting here, shows how most ddr4 kits are still faster in absolute terms and much slower vs heavily turned (e.g. my 3800c14 is around 52-53ns on average):

    upload_2021-11-8_20-29-58.png

    timespy results show ddr5 on top, up to 5.8% in the most extreme case:

    upload_2021-11-8_20-33-34.png

    huge gains in some games like FC6 25% faster going from 3000c15 to 5400c36 granted he was using 1080p Mid settings so not realistic

    upload_2021-11-8_20-36-9.png

    at 4K that drops off to 1-4% difference now:

    upload_2021-11-8_20-38-4.png

    full video:

     

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