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Slow SSD write benchmark? Does it matter it's 65% full?

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May 27, 2013 8:50:10 AM

I've had this Kingston HyperX 3K 90GB SSD in my system for about a year now. I don't remember what the benchmarks were at the time of installation, but this is what I'm getting now:

AS SSD Results (read ---- write):

  • Seq: 443.53 MB/s ----------- 113.28 MB/s
  • 4K: 20.56 MB/s ------------- 61.32 MB/s
  • 4K-64Thrd: 112.90 MB/s ---- 103.37 MB/s
  • Acc Time: 0.164 ms --------- 0.279 ms


  • Similar results from CrystalDiskMark. Doesn't that seem too low for seq. write?

    According to http://www.storagereview.com/kingston_hyperx_3k_ssd_review, max seq. write is supposed to be 510 MB/s (and 550 for read). I understand that advertised speeds are only theoretical, but 113 for seq. read seems too low. Or am I missing something?

    FWIW, I'm running Win 7 64bit on that SSD plus several applications and games installed (not running during the benchmark, of course). Drive is 65% full right now. That wouldn't be throwing off the benchmark, would it?

    Other specs:

    - ASRock Z77 Extreme6 motherboard
    - i5-3570K CPU
    - 2 x 4GB G. Skill Ram in dual channel
    - HIS Radeon HD 7850 GPU
    - SSD plugged into SATA 3 port using 6 gbps cable and reporting 6gbps in Intel Rapid Storage tool
    - SSD configured as AHCI
    - Write-caching enabled on the drive
    a b G Storage
    May 27, 2013 8:56:02 AM

    Yes it would throw off the bench on most drives.
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    May 27, 2013 9:01:08 AM

    the_jiveman said:
    I've had this Kingston HyperX 3K 90GB SSD in my system for about a year now. I don't remember what the benchmarks were at the time of installation, but this is what I'm getting now:

    AS SSD Results (read ---- write):

    • Seq: 443.53 MB/s ----------- 113.28 MB/s
    • 4K: 20.56 MB/s ------------- 61.32 MB/s
    • 4K-64Thrd: 112.90 MB/s ---- 103.37 MB/s
    • Acc Time: 0.164 ms --------- 0.279 ms


  • Similar results from CrystalDiskMark. Doesn't that seem too low for seq. write?

    According to http://www.storagereview.com/kingston_hyperx_3k_ssd_review, max seq. write is supposed to be 510 MB/s (and 550 for read). I understand that advertised speeds are only theoretical, but 113 for seq. read seems too low. Or am I missing something?

    FWIW, I'm running Win 7 64bit on that SSD plus several applications and games installed (not running during the benchmark, of course). Drive is 65% full right now. That wouldn't be throwing off the benchmark, would it?

    Other specs:

    - ASRock Z77 Extreme6 motherboard
    - i5-3570K CPU
    - 2 x 4GB G. Skill Ram in dual channel
    - HIS Radeon HD 7850 GPU
    - SSD plugged into SATA 3 port using 6 gbps cable and reporting 6gbps in Intel Rapid Storage tool
    - SSD configured as AHCI
    - Write-caching enabled on the drive


  • i get similar write speeds on my HyperX Blue 120GB and its about 70% full as well.
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    l
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    May 27, 2013 3:21:45 PM

    OK, good to know. As long as this is normal. I guess I wasn't aware that SSD get slower as they get fuller.
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    Best solution

    a b G Storage
    May 27, 2013 3:47:12 PM

    the_jiveman said:
    OK, good to know. As long as this is normal. I guess I wasn't aware that SSD get slower as they get fuller.


    Depends on the model actually, but it applies to all SSDs from 128GB and under.
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