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  1. #1
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    M.2 NVMe changed speed to slow after working perfect.

    Dear forum.

    I have a strange problem I have not been able to solve my self or by reading tips and tricks.

    I have the Crosshair VI x370 motherboard bios version 1401 ( previous 1201)
    When my got my computer i installed the Samsung SM961 SSD M.2 2280 NVMe - 256GB ( std firmware cannot be updated i think ).

    In the start my new ryzen computer and the m.2 worked perfect with very high speed 3100read and 1400 write ( something like that )
    Also i did some benchmark tests and it performed like top 5% best ryzen systems.

    I am not sure why, but all of a sudden I have read speeds of 300mb/s or 600 or 800 way below what this hardware can do.
    I dont know what i did wrong other than I have updated the bios 2 times to bios 1201 and now to 1401 to see if that solved my issue.
    But it did not.

    I read that allot of people suggest to others that they should change from sata to pcie in bios ( somewhere ) but i do not have this option, i can only change achi - raid and select boot device.
    I tried to fool arround with the settings and also reset everything to optimized default but not success.

    My feeling is that it might not be the bios that is my problem, but intead some kind of bug in windows 10.
    I tried to update the chipset drivers to the new version and this did not help.
    I tried removing the microsoft NVMe driver and restart.
    I tried downloading the Samsung SM961 driver for NVMe but this did also not help.

    My computer is
    c:/ Samsung SM961 SSD M.2 2280 NVMe - 256GB
    D:/ is running in raid 0 i think with two samsung 850 evo drives in raid mode.
    e:/ is a std 4tb backup HD from segate 7200rpm

    Ryzen 1800 ( oc 4000mhz )
    16GB ddr 4 ram ( 3200 mhz )
    nvidia gtx 1080
    windows 10 64bit.

    My C: is encrypted with Veracrypt. I am not sure if I remember correctly if my m.2 ran at 100% speed before i encrypt the HD, or if it have also worked perfect after and run at 100% speed..... im pretty sure it have no effect on the speed.

    Anyway, I hope you guys can give me some suggestion about what i can try, els I might someday format my computer and start over to see if that solve my problem.

    Thank you in advance.

  2. #2
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    Quote Originally Posted by delevero View Post

    My C: is encrypted with Veracrypt. I am not sure if I remember correctly if my m.2 ran at 100% speed before i encrypt the HD, or if it have also worked perfect after and run at 100% speed..... im pretty sure it have no effect on the speed.
    Is it possible for you to remove the encryption and test if this helps?

  3. #3
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    Quote Originally Posted by anr11 View Post
    Is it possible for you to remove the encryption and test if this helps?
    hello.
    Thank you for your suggestion/question.
    I will try and remove the encryption and see if that help tomorrow, and give a heads up about if that solved the problem.

  4. #4
    Banned Array JustinThyme PC Specs
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    Encryption changes everything! Losing speed is the price to pay if you really need your drive encrypted, especially by open source encryption that isn't optimized for....well anything. I have one encrypted drive to keep all my sensitive data on. There really isn't that much that is so sensitive I need to encrypt it, not like I'm running a DOD project up in here and would never encrypt a disk that has the OS or apps on it.

    Everything being written and read on an encrypted drive has to be processed. Its not so much that the drive is slower, its that its path to and from is slowed down.

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