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    BAD 960 EVO m.2 RAID 0 performance

    Discussion in 'Sager and Clevo' started by stefan063, Jan 6, 2018.

  1. stefan063

    stefan063 Notebook Consultant

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    I have EUROCOM SKY X6W with 32GB 2400 Kingston Hyper X, i7 6700k overclocked to 4.5Ghz, GTX980 and 2x 960 EVO NVMe in RAID 0 with latest Windows 10 installed. I also have 26% full of drives capacity. Am I missing something? One picture is before and other is after Disk defrag. Tried defrag for the first time since install of NVMe (4months ago). Little better after defrag but I know the performance should go higher.

    20180106_154323.jpg 20180106_155452.jpg
     
    stefan063, Jan 6, 2018
    #1
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  2. Vistar Shook

    Vistar Shook Notebook Deity

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    Perhaps there isn't enough bandwith for the Raid 0?

    Enviado de meu Pixel 2 usando Tapatalk
     
    Vistar Shook, Jan 6, 2018
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  3. stefan063

    stefan063 Notebook Consultant

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    What do you think not enough bandwidth? From where/what?
     
    stefan063, Jan 6, 2018
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  4. Vistar Shook

    Vistar Shook Notebook Deity

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    Truth is, I never put NVME drives in Raid, because it doesn't make much sense at the 960 speeds. Although you might have full PCIe lanes for each NVME, I think maybe the DMI is limiting the bandwith to 3.4GB/s.
    So with the last gen NVME you could get a boost on the sequential reads with Raid, with this current samsung gen, the boost is bottlenecked.
     
    Vistar Shook, Jan 6, 2018
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  5. KY_BULLET

    KY_BULLET Notebook Evangelist

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    KY_BULLET, Jan 7, 2018
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  6. stefan063

    stefan063 Notebook Consultant

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    No. I haven't updated it yet. I saw some major problems after update. Waiting to see how it goes...
     
    stefan063, Jan 8, 2018
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  7. Meaker@Sager

    Meaker@Sager Company Representative

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    Mainstream intel platforms (Z170, z270, z370 etc) use the chipset to connect to M.2 drives. The chipset has a maximum speed of 4x PCI-E 3.0 lanes to the CPU so yes 3.6GB/sec is around the bandwidth limit of the platform.

    Only the HEDT (High end desktop platform (X299)) can do PCI-E raid from the CPU for Intel and it's still in beta as it is anyway.

    The performance looks fine.

    For reference the AMD mainstream (X370) uses 4x lanes from the CPU to a single M.2 slot. The HEDT supports up to 6 drive raid at the moment for a maximum throughput of around 20GB/sec.

    The sockets and power consumption on these platforms can go to a whole other level however.
     
    Meaker@Sager, Jan 8, 2018
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  8. Meaker@Sager

    Meaker@Sager Company Representative

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    Also to make this point very clear I am not editing the above post.

    @stefan063 (and anyone else)

    Do not defrag your SSDs
    The data on them is maintained by the controller and is hidden from windows, how windows thinks the data is laid out is not how it really is layed out. Defragging will only cause the SSD to wear out faster due to unnecessary drive writes.
     
    Meaker@Sager, Jan 8, 2018
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  9. stefan063

    stefan063 Notebook Consultant

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    stefan063, Jan 8, 2018
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  10. Meaker@Sager

    Meaker@Sager Company Representative

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    Meaker@Sager, Jan 8, 2018
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  11. Vistar Shook

    Vistar Shook Notebook Deity

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    He has the 960 Evo, so the speed increase wasn't that great, but like you said limitied by the motherboard DMI3.0.
     
    Vistar Shook, Jan 8, 2018
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  12. Meaker@Sager

    Meaker@Sager Company Representative

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    Did you see the review, the results should simply be better latency wise. :)
     
    Meaker@Sager, Jan 8, 2018
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  13. stefan063

    stefan063 Notebook Consultant

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    Yeah...

    Those are better results than mine since it's PRO... :)
     
    stefan063, Jan 9, 2018
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  14. Lightning_-

    Lightning_- Notebook Consultant

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    How did you get the mxm gtx 980 in that? Its not the 980m right?
     
    Lightning_-, Dec 2, 2018
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  15. Meaker@Sager

    Meaker@Sager Company Representative

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    More likely the M was left off, yes.
     
    Meaker@Sager, Dec 2, 2018
    #15