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    Why does my SSD decrease in Read Speed.

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by michaeljean, Oct 4, 2011.

  1. michaeljean

    michaeljean Notebook Consultant

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    I have a samsung 470 series and when I first got it speed was 250 did test a week later it was down to 180. Did performance optimazation it's back up to 250 two weeks later it's back down to 186.

    Can somebody explain to me why this happens I don't save alot of files to the hard hardly any. I have a 2nd hdd in place of my dvd so everything goes there (like even log files) I made it so it barly writes to the ssd.
     
    michaeljean, Oct 4, 2011
    #1
  2. tilleroftheearth

    tilleroftheearth Wisdom listens quietly...

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    What's your O/S?

    What is your % filled on the SSD?

    What SATA drivers are you running; IRST?
     
    tilleroftheearth, Oct 4, 2011
    #2
  3. 3Fees

    3Fees Notebook Deity

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    What 470 SSD 64,128,256 ?
    What mode in BIOS are you running AHCI or IDE mode ? AHCI is best.
    What Firmware are you using ? Latest is AXM09B1Q
    What Powerplan are you using ? Power Saver, Balanced,High Performance
    High Performance-is fastest for these SSD's
    Did you do Samsung Magician ver 2.0 O/S Optimization ?
    What Notebook you using ?
    What Chipset does your notebook have ?
    Mine is consistent all the time in Read/Write ~250/170----64Gb size.

    Cheers
    3Fees :)
     
    3Fees, Oct 4, 2011
    #3
  4. michaeljean

    michaeljean Notebook Consultant

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    Dell XPS 16 sata 2 running win 7x64 ssd is only half full with windows and office. Running in achi mode, using balanced
     
    michaeljean, Oct 4, 2011
    #4
  5. 3Fees

    3Fees Notebook Deity

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    Using Balanced Power.


    -----------------------------------------------------------------------
    CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
    Crystal Dew World : Crystal Dew World
    -----------------------------------------------------------------------
    * MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

    Sequential Read : 248.792 MB/s
    Sequential Write : 175.400 MB/s
    Random Read 512KB : 0.000 MB/s
    Random Write 512KB : 0.000 MB/s
    Random Read 4KB (QD=1) : 0.000 MB/s [ 0.0 IOPS]
    Random Write 4KB (QD=1) : 0.000 MB/s [ 0.0 IOPS]
    Random Read 4KB (QD=32) : 0.000 MB/s [ 0.0 IOPS]
    Random Write 4KB (QD=32) : 0.000 MB/s [ 0.0 IOPS]

    Test : 100 MB [C: 37.6% (22.4/59.6 GB)] (x3)
    Date : 2011/10/04 9:28:18
    OS : Windows 7 Home Premium Edition SP1 [6.1 Build 7601] (x64)


    Using High Power :

    -----------------------------------------------------------------------
    CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
    Crystal Dew World : Crystal Dew World
    -----------------------------------------------------------------------
    * MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

    Sequential Read : 254.468 MB/s
    Sequential Write : 175.561 MB/s
    Random Read 512KB : 0.000 MB/s
    Random Write 512KB : 0.000 MB/s
    Random Read 4KB (QD=1) : 0.000 MB/s [ 0.0 IOPS]
    Random Write 4KB (QD=1) : 0.000 MB/s [ 0.0 IOPS]
    Random Read 4KB (QD=32) : 0.000 MB/s [ 0.0 IOPS]
    Random Write 4KB (QD=32) : 0.000 MB/s [ 0.0 IOPS]

    Test : 100 MB [C: 37.6% (22.4/59.6 GB)] (x3)
    Date : 2011/10/04 9:33:52
    OS : Windows 7 Home Premium Edition SP1 [6.1 Build 7601] (x64)

    Consistently sizzling fast,, :cool: , :D


    Cheers
    3Fees :)
     
    3Fees, Oct 4, 2011
    #5
  6. aintz

    aintz Notebook Evangelist

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    is trim enabled? windows 7 suppose to do it automatically but you never know
     
    aintz, Oct 4, 2011
    #6
  7. 3Fees

    3Fees Notebook Deity

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    To check Trim do this:

    Open the command prompt in accessories folder (windows 7)
    Right click and select run as adminstrator-select 'yes'
    type at

    Command prompt > fsutil behavior query disabledeletenotify

    then press Enter key on keyboard,,result is displayed.

    DisableDeleteNotify = 1 (Windows TRIM commands are disabled)
    DisableDeleteNotify = 0 (Windows TRIM commands are enabled)

    mine is enabled.

    Cheers
    3Fees :)
     
    3Fees, Oct 5, 2011
    #7
  8. michaeljean

    michaeljean Notebook Consultant

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    You call that speed decrease wow,
     
    michaeljean, Oct 5, 2011
    #8