My Intel SSD 520 Series 120GB is slow ?

I have made a test with CrystalDiskMark Default Test

Seq :
Read = 463.7
Write = 158.5

512K :
Read = 405.3
Write = 154.8

4K :
Read = 23.78
Write = 57.32

4K QD32 :
Read = 141.3
Write = 142.2

All in MB/s

Why so slow, I use Windows 8 Pro.
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More about intel ssd 520 series 120gb slow
  1. By slow, are you refering to measured benchmarks, or to BOOT time and program load times?

    I do not use CrystalDiskMark; However I think you can select benchmark using Highly compressed data, or compressed data. To get Manuf specified results you need to use Highly compressable data (Intel 520 uses a sandforce controller). Personnally I use AS SSD which uses data that is NOT compressable.

    Another factor is chipset and Hard drive controller:
    A) Intel chipset slightly faster than AMD chipset (did not specify which MB).
    B) which driver are you using, ie for a Intel chipset the iaSTor driver is slightly faster than the default microsoft msahci driver.

    Can check with AS SSD (as I said I do not use crystal's and deffinately do not use ATTO). If you open AS SSD, in the uper left you will see:
    .. Make model and FW version
    .. Driver. For Intel you wanto to see iaSTor (or equivlant) not msahci. If it finds pcide it will also say "BAD"
    .. Partition alignment (yes this is important for SSDs). want to see "OK"

    As to Sequencial performance (ie =>500 mb/s).
    1) For Sandforce controllers, need to run ATTO, or crystal (with Highly compressable data) to get Manuf specs. Not so with Marvel/Samsung controller based SSDs).
    2) Seq performance is the LEAST important parameter for a OS + Program drive - It is the Random 4K read/write performance that is important.
  2. are you set up in AHCI mode? or are you in IDE/ATA mode? That can make some difference. Does it feel slow? Or are you only judging the speed by the benchmarks you are running?

    Also, how full is your drive? Filling a SSD past 80% can have the same kinds of slowdown issues that you can get with a HDD, granted for entirely different reasons. If your drive is getting full then releaving some space can help things when under sustained use.

    Also, those benchmarks are really not all that slow. You would never get that fast of performance out of a HDD. Intel drives are built for stability and longevity, not performance, so if you were to get a different SSD then you could get more performance, but these seem to be in line with what you should expect from an SSD.

    The performance in an SSD is in the lack of seek time, not really in MB/s. Due to the extremely low seek time (typically .1-.2ms compare to a HDD at 8-25ms) an SSD can do nonsequential workloads MUCH faster than a HDD. This includes things like opening programs, caching things, running the OS, working with a lot of small files, and running a bunch of background programs at the same time.

    SSDs do not have a ton of extra performance when it comes to sequential and linear workloads such as media playback and storage. My new 2TB HDDs can push out ~225MB/s each on both read and write... but only when doing sequential workloads. Start multi-tasking a little bit and then slow down to ~150MB/s. Start doing heavy multi-tasking (like heavy video editing) and then they nosedive down to 50-80MB/s. Compare that to heavy editing on my SSDs which still net me ~250MB/s which is the same that they push out on an average noncompressable sequential workload.

    Benchmarks are strange things, and you can get them to say just about anything. What matters is task completion and throughput on real world tests (file transfers, opening programs, and real workloads).
  3. Hello,

    Here is my PC spec :
    Processor : Core i7 3770 3.4GHz
    Motherboard : MSI H77MA-G43
    Memory : Dual Channel Visipro 2 x 4 GB PC3-12800 CL11-11-11-29
    SSD : Intel SSD 520 Series 120GB
    Harddisk : Seagate 2TB SATA III 7200rpm
    VGA Card : HIS Radeon HD 7850 IceQ X 2GB GDDR5 256 Bit
    PSU : Cooler Master GX EU 550W Bronze 80+
    Simbadda : Sim-Q.
    Monitor : LG LCD L1753S
    Speaker : Simbadda CST z100
    Keyboard : Logitech standard PS/2
    Mouse : Gaming Mouse A4Tech XL-747H Blue Spider

    Note :
    I set the SATA mode to AHCI in UEFI BIOS.

    And how to check partition alignment and SSD driver iaStor?
    Sorry, I am a newbie with SSD, this is my first use :(
  4. Run AS SSD, Do Not need to run benchmark.
    Upper left you will see:
    .. SSD make/model, and FW version
    .. Driver: Most likely you will see msahci unless you have installed Intels driver (iaSTor)
    .. Partition Alignment: If this was a clean install windows will align partition correcly for a SSD and you should see "OK".

    AS SSD:
    .. OR

    NOTE: Intels's driver is slightly beter than default msahci, so upto you.
    Intel driver:
    .. OR, to let Intel scan your system:
  5. Hi,

    I have tried AS SSD.

    On the left upper, it said:

    iaStorA - OK
    359424 K - OK
    117.9 GB

    What does it mean ?
  6. You are using Intel driver (GOOD), Might want to check the version Can do that from control panel, System, device manager. Should be ver 10.6, latest is 11.5 or 6. But the Latest primarilly added Trim support for SSD when it is a member drive of a RAID set (no concern for you)

    Partition alignment show OK so good there.

    Your score is slightly lower than specs as spec for Most drives are based on ATTO score using highly compressable data (Not real life), and the Sandforce controllers based SSDs favor highly compressable data.

    Bottom Line, forget the bench mark and ENJOY.
    If really concerned, check a review that shows AS SSD scores for your drive.

    Added: Found this:
  7. Hi,

    I have checked the version :
    It is 6.2.9200.16384
    I think it is outdated.

    How to update ?
  8. Best answer
    Try link:

    This will take you to Intels web page that allows scanning your system for updating all Intel drivers.
    .. OR
    This is the link for Intels rst driver, select OS (ie win7 64 bit) to manually download a specific rst driver.
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