Micron C400 256GB 6Gbps mSATA SSD Review – Crucial M4 mSATA SSD in Disguise


Over the last little while, we have been assisting with beta testing new benchmark software called Anvil Storage Utilities which is an absolutely amazing SSD benchmarking utility.  Not only does it have a preset SSD benchmark, but also, it has included such things as endurance testing and threaded I/O read, write and mixed tests, all of which are very simple to understand and utilize in our benchmark testing.

Anvil Storage Utilities does a great job of identifying both the system and SSD being tested as well as being one of the most complete benchmarks available. Disk transfer speeds are in the ballpark and low 4k random performance of 67MB/s write is decent for a mSATA form factor.  As well, a high of 60, 728 IOPS falls just short of specs but is still a great result.


The SSD Review uses benchmark software called PCMark Vantage x64 HDD Suite to create testing scenarios that might be used in the typical user experience. There are eight tests in all and the tests performed record the speed of data movement in MB/s to which they are then given a numerical score after all of the tests are complete. The simulations are as follows:

  • Windows Defender In Use
  • Streaming Data from storage in games such as Alan Wake which allows for massive worlds and riveting non-stop action
  • Importing digital photos into Windows Photo Gallery
  • Starting the Vista Operating System
  • Home Video editing with Movie Maker which can be very time consuming
  • Media Center which can handle video recording, time shifting and streaming from Windows media center to an extender such as XBox
  • Cataloging a music library
  • Starting applications


The C400 pulled through PCMark Vantage tests with a Total Point Score high of 67337 points and a high transfer speed of 377MB/s when importing pictures into Windows Photo Gallery. In checking it’s placement amongst all mSATA SSDs tested to date, it has only been beat by the MyDigitalDiscount SMART 240GB SSD and placed just above it’s 128GB brother.


The following chart displays the Vantage ranking of mSATA SSDs tested to date and the Micron C400 256GB SSD has attained the second highest spot.



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    The Mushkin Atlas SATA III mSATA SSD is still not reviewed here?????

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    Nice review. But what about power consumption ? I would like to put one msata in my dell laptop. Is there any big difference between the Crucial and the ADATA ?

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      Typically, we don’t address power consumption as it is not indicative of something the typical consumer concerns themselves with. See below for manufacturer listed specs:

      C400 – 85/200mW
      ADATA – .45/1.5W

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    Could this be as good as having Samsung 830 256GB SSD? ( not mSata version )? I am thinking to use this with 7.2K RPM 750GB , but not sure if its worth using SSD or mSata SSd with HDD? Thanks

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    I have found that AS SSD transfer testing is not accurate. If you manually transfer a large file and I guarantee you the transfer rate is nowhere near what AS SSD shows.

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      Thanks Bill but we find it’s results to be consistent, not only in this analysis but also, in every analysis we have done and used it on the site.

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      umm…pretty sure Bill Gates doesn’t know how to use a computer

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      You need to turn off your virus scanner. On access virus scanning really hurts transfer performance of fast SSDs. The reason why AS SSD doesn’t show this degradation is that AS SSD writes to a pre-created file and is not reading from another drive, so the virus scanner isn’t triggered.

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    Is this available anywhere on the web?

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    Useful review, thanks Les. Thinking of getting one for my Lenovo T420s (which has an mSATA slot) but as yet, Crucial’s compatibility tool is marking them as not compatible with any of the Thinkpads. Given what you mentioned about the Thinkpad market for mSATA upgrades I’m guessing they’re being over cautious, wondering if you have any thoughts on this. Thanks.

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      I have yet to find ANY mSATA incompatible with any of my laptops and, specifically the X100, we did testing of serveral drives. Yes, they will list it as incompatible until tested. I can not for the life of me see any reason why one mSATA would be compatible while another would not though. They all serve the same purpose in the same way after all.

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    I have the Crucial M4 mSATA 256GB model on order. It should arrive later this week. Looking forward to using it. Thanks for the review Les.

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    Hy, first of all, I would like to thank you for the huge amount of information I found on this site. Nice review, Im almost convinced about this one but Im not sure my lenovo Y570 would support sata3 in the msata slot. Im wondering if you have any information regarding this :). I plan to use it as my boot drive with the original 2,5″ hdd as a “movie shelf”. The other options Im considering are -OCZ Nocti mSATA 120GB
    -Crucial RealSSD M4 mSATA SSD 128GB
    -Adata XPG SX300 128GB mSATA
    They have almsot the same price and rigth now i cant deside wether to go for 256gb or just stay with 128gb. The 128gb range seems more valuable.
    If you could help me decide I would really appreciate. Thanks

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      a quick check seems to return that it is SATA 3 so I might suggest confirmation through a Google search. The next question deals with capacity as the three others you highlighted seem to be lower capacity drives. as for my choice of the bunch…..no need to answer on that one!

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    Very useful review!
    Having one question though:

    NAND IC’s use dual die internally or not? 4K Random reads should be greater if so, if not it’s explained in a way (less channels)

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