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    Samsung EVO850 Rapid mode - bonkers?!

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by herc182, Feb 18, 2017.

  1. herc182

    herc182 Notebook Consultant

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    I replaced the 1tb HDD in my Alienware with my 500gb Samsung SSD. I enabled RAPID mode and got the most bonkers results I have seen (this isnt a PCI express SSD).


    Whats going on??
     

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    herc182, Feb 18, 2017
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  2. smartuy

    smartuy Notebook Guru

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    what

    "GTX 1080 in a thinbook is fine" -Razer
     
    smartuy, Feb 18, 2017
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  3. herc182

    herc182 Notebook Consultant

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    I added a jpeg. I ran it a few times (crystal disk) and got the following benchmark:


    Sequential Read (Q= 32,T= 1) : 4273.744 MB/s
    Sequential Write (Q= 32,T= 1) : 3063.290 MB/s
    Random Read 4KiB (Q= 32,T= 1) : 589.408 MB/s [143898.4 IOPS]
    Random Write 4KiB (Q= 32,T= 1) : 206.454 MB/s [ 50403.8 IOPS]
    Sequential Read (T= 1) : 4474.819 MB/s
    Sequential Write (T= 1) : 4363.665 MB/s
    Random Read 4KiB (Q= 1,T= 1) : 586.154 MB/s [143104.0 IOPS]
    Random Write 4KiB (Q= 1,T= 1) : 215.825 MB/s [ 52691.7 IOPS]
     
    herc182, Feb 18, 2017
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  4. John Ratsey

    John Ratsey Moderately inquisitive Super Moderator

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    Rapid Mode is smoke and mirrors. It uses some of the RAM to cache some of the SSD contents so you are effectively testing your RAM (the clever bit is to guess what to put in the cache). If you have loads of RAM then perhaps Rapid Mode might help. Otherwise the RAM which Rapid Mode uses means that there is less RAM available for Windows and programs with the consequent increase of virtual memory on the SSD.

    John
     
    John Ratsey, Feb 18, 2017
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  5. herc182

    herc182 Notebook Consultant

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    In that case, I have very fast ram :)
     
    herc182, Feb 18, 2017
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  6. John Ratsey

    John Ratsey Moderately inquisitive Super Moderator

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    The raw bandwidth of your RAM should be a lot faster than that (over 20GB/s for dual channel RAM on recent notebooks according to SiSoftware Sandra) so the Rapid software is slowing it down.

    John
     
    John Ratsey, Feb 18, 2017
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