xps l521x slow msata port?

So other than the obvious wifi and overheating issues with this laptop, I may have another issue and am reaching out to all the xps 15 (l521x) with an msata ssd as their boot os owners.

I purchased an adata xpg sx301 256g msata, its transfer speed should be near the 550MB.
im using it as my os boot location, windows 8 uefi and its runs fine, boot time 4.5s

the issue is, I ran tests and its read speeds are where they should be, however its Sequential write speed is very low compared to where it should be(and all the other write speeds), I emailed adata and they said that it could be a problem with my laptop. Can some of you run crystal mark so I may compare and see if it is indeed a limitation set by the motherboard. (chkdsk comes back without error)


 Dear Elvis,

 Thank you for contacting ADATA USA. 

The transfer rates vary on the type of data being transferred, also each system configuration will have a different transfer rates.

 We recommend using ChkDsk to verify if the drive has any bad sectors which may be causing the slow transfer rates. If the drive does not bad sectors we recommend checking with Dell for troubleshooting, you may have a compatibility issue.


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CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo

                           Crystal Dew World : Crystal Dew World

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* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :   445.302 MB/s
          Sequential Write :   136.033 MB/s
         Random Read 512KB :   370.312 MB/s
        Random Write 512KB :   132.622 MB/s
    Random Read 4KB (QD=1) :    15.021 MB/s [  3667.2 IOPS]
   Random Write 4KB (QD=1) :    56.283 MB/s [ 13740.9 IOPS]
   Random Read 4KB (QD=32) :    83.095 MB/s [ 20286.9 IOPS]
  Random Write 4KB (QD=32) :   130.943 MB/s [ 31968.5 IOPS]


  Test : 4000 MB [C: 21.6% (51.4/238.0 GB)] (x5)

  Date : 2013/11/14 23:24:29

    OS : Windows 8.1  [6.3 Build 9600] (x64)