sammy 840 pro 128gb internal ssd vs external TB ssd

Discussion in 'iMac' started by wkw, Oct 13, 2013.

  1. wkw, Oct 13, 2013
    Last edited: Oct 13, 2013

    wkw macrumors 6502


    Mar 23, 2004
    Eugene, OR
    Howdy, just a quick question.
    I have a 2011 27" i7 ssd equipped imac. The ssd is the original 256gb as spec'd from apple. it reads and writes around 170MB/sec. not bad..
    I just bought a samsung 840 pro 128gb ssd. I have connected via TB with a seagate adapter and it hits around 350MB/sec write and 385MB/s read. Pretty impressive but I was under the impression that it would be well over 400MB/sec.

    Would the samsung run any faster if I installed it internally?

    I am not afraid of taking this machine apart to do this. I have already installed a 2tb drive in the empty HDD bay and have things setup as fusion. If I won't notice a speed increase by installing it internally vs using TB I probably won't go to the trouble. Perhaps its the larger size 840 pro ssd's (256gb and larger) which read and write at faster speeds

    thanks for your input

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  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    I don't think you will see an improvement by going internal. The issue is the 128 is much slower than the 256 in speed tests with any drive. If you check test results in web reviews for the 128 you are right on target.
  3. dollystereo macrumors 6502a


    Oct 6, 2004
    Yes internally, the drive will be really fast, around 500r, 380 w.
    The larger ones (256 and 512 are faster 500/500)
    It depends what you want to do, but the Pro drive is better than the one you have internally, it's not a bad idea to swap them.

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