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    Slow SSD speeds?

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by a3r0x, Nov 14, 2010.

  1. a3r0x

    a3r0x Notebook Evangelist

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    Hi I have the following speeds after applying all the SSD tweaks found on this forum:
    [​IMG]


    My SSD: SAMSUNG PM800 w/ TRIM 128GB VBM24D1Q

    I know the 4k speeds are slow, so perhaps I have done something wrong (or is it the SSD?).

    What do you propose to do?
     
    a3r0x, Nov 14, 2010
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  2. ab9003

    ab9003 Notebook Guru

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    Have you tried any software that tweaks SSD's for you such as? Elpamsoft.com

    Who knows, there may have been some performance enhancements you may have missed.
     
    ab9003, Nov 14, 2010
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  3. Slayer366

    Slayer366 Notebook Consultant

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    I would assume it is from the caching system.

    In other words, the way those SSD drives are designed to be speedy is because it tries to prepare for caching LARGE amounts of data, so when it goes to copy over as little as 4k, it has already spent more time prepping a large area of memory in its internal cache assuming it will be copying a lot of data.

    That, however, is only an educated guess. I can't say that is entirely accurate, but from the looks of it, I'd say that a sequential read speed of 200MB & a seq write speed of 150MB isn't bad. I barely make 70MB/s on my 5400 RPM. I certainly wouldn't be disappointed with that kind of speed.

    Edit: Oh, yeah! Another reason could be that 4K isn't enough data to even make MB/s of speed LOL.
     
    Slayer366, Nov 14, 2010
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  4. Tinderbox (UK)

    Tinderbox (UK) BAKED BEAN KING

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    Tinderbox (UK), Nov 14, 2010
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  5. Slayer366

    Slayer366 Notebook Consultant

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    What Tinderbox says here could very well be true, too. Some chipsets are certainly not designed nearly as well as others. One good tip would be to stay away from SiS chipsets. If you want to see a 2.0 GHz computer run like a 500MHz Pentium 3, having a SiS chipset would do just that.
     
    Slayer366, Nov 14, 2010
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  6. a3r0x

    a3r0x Notebook Evangelist

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    I spotted one mistake in my optimization (I didn't change the "Start" value in intelppm and Processor tabs in the registry).

    I also changed the values of processor thresholds to maximum performance.

    Now my 4K Read is 19.93 MB/s and Write 8.362 MB/s
    But the 4K QD32 Write has fallen to 5.335 MB/s
     
    a3r0x, Nov 14, 2010
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  7. Leopard2

    Leopard2 Notebook Consultant

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    Leopard2, Nov 15, 2010
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