*** Official Clevo P870KM1/P870KM1-G/Sager NP9876 Owner's Lounge! - Phoenix 3.0 ***

Discussion in 'Sager/Clevo Reviews & Owners' Lounges' started by Spartan, Jan 5, 2017.

  1. Donald@HIDevolution

    Donald@HIDevolution Company Representative

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    So, theoretically, 2x 960 Pro in RAID 0 would be able to give upwards of 6,000MB/s sequential Read and 3,500MB/s sequential Write, and 3x 960 Pro in RAID 0 would give upwards of 9,000MB/s sequential Read and 5,300MB/s sequential Write?
     
  2. Porter

    Porter Notebook Virtuoso

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    Hey I like even numbers, so a 2 + 2 drive setup is better than a 3 + 2! :D

    Also, unless you have 12TB internal currently you aren't limited even on the DM3. I will slowly work my way up there, even with my crazy storage needs that is more than I need.
     
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  3. D2 Ultima

    D2 Ultima Livestreaming Master

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    Yeah, something like that. 3500 sequential --> ~6000 in raid 0 --> ~9000 in raid 0

    But with the existing chipsets, it'll quicker settle closer to about 3800 under any sustained load. Burst transfers can happen though.
     
  4. Meaker@Sager

    Meaker@Sager Company Representative

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    PCI-E 3.0 theoretical is 1GB per lane, so the same 4GB/sec theoretical limit minus overheads (same as Z170).

    This is what I am saying, the socket does not allow the link to be widened between the chipset and the CPU (PCI-e lanes = pins). This is the main reason x99 is 2011 pins vs Z170/Z270 1151.

    3 drives can improve request latency of course as three controllers handling a stream can react faster than 1 even if they can't push more data through.
     
  5. Donald@HIDevolution

    Donald@HIDevolution Company Representative

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    So, where is my math off? Why would it settle at about 3800MB if 12GB is the theoretical, minus overheads, with 3x PCIe 3.0 x4 SSDs in RAID 0?
    .
     
  6. D2 Ultima

    D2 Ultima Livestreaming Master

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    No no. The DMI can handle 4GB/s *alone*. As in, if I was data-transferring from a NVMe drive and using an eGPU at the same time, the eGPU would falter.
     
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  7. Meaker@Sager

    Meaker@Sager Company Representative

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    Because that three lane highway has to merge into a single lane before it gets to the cpu (which it has to).
     
  8. Donald@HIDevolution

    Donald@HIDevolution Company Representative

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    Thank you...that clears it up!
     
  9. ssj92

    ssj92 Neutron Star

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    GPU's will be the same so all DM2/3 users should be fine.
     
  10. Q937

    Q937 Notebook Deity

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    While it's true that the total max bandwidth is the same, it's still nice in that a) you get more total storage space at PCIe x4 speeds and b) you can theoretically do 4K random reads from them all simultaneously even with relatively high QD and not saturate the DMI link.

    Personally, I'm interested to see if the motherboard is physically compatible with the DM3 because that extra slot is quite useful to me, even if I have to remove the MB to get access to it since there are only two cutouts under the KB.
     
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