Which SSD (TRIM)?

Discussion in 'iMac' started by Oli180, Aug 29, 2015.

  1. Oli180 macrumors newbie

    Aug 14, 2015
    I decided to replace my old HDD with an SSD in my iMac, but I'm not sure with which one. I thought a Samsung 850 EVO would be the best choice but I read about some TRIM issues with the Samsung 8xx series. So is TRIM that important with these models? If so, do you know any other SSDs with similar performance but good TRIM handling? Some people say it works well with OS X, some say it works fine with Windows 10 without TRIM, but it would take a longer period of time to notice slowdowns with disabled TRIM.
  2. SandboxGeneral Moderator emeritus


    Sep 8, 2010
    I have Samsung SSD's in two of my three Mac's and I have no issues with them or with TRIM. Yes, TRIM is necessary to keep them running optimally.

    There are third-party apps to enable TRIM and in 10.11 Apple made a Terminal command to enable it through OS X.

    On Windows, TRIM is supported natively. I have a Samsung SSD in my office PC and have been running it for years without issue.
  3. matreya macrumors 65816


    Nov 14, 2009
    Actually, native TRIM support was introduced to 10.10.4

    I have Samsung 840 Pro and 850 EVO SSDs and trim works well on them.
  4. chrfr macrumors 604

    Jul 11, 2009
  5. Lankyman macrumors 68000

    May 14, 2011
    Windows supports TRIM automatically and so does the latest builds of Yosemite. I think your information source is somewhat out of date or misinformed.

    I run an EVO 850 in my iMac - trouble free. :)
  6. rkaufmann87 macrumors 68000


    Dec 17, 2009
    Folsom, CA

    Easy, get an OWC SSD. You can get them at www.macsales.com
  7. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    Just get the 850 Evo. Don't worry about the TRIM.

    If you want to use it, you can just run the terminal command and then have the TRIM. I personally recommend to use TRIM, which can effectively turn your SSD's empty space into over provision. This help to reduce unnecessary write operation during GC, and help your SSD to keep the high writing speed.

    I have a 840 Evo, my machine run 24/7, I use it for OS, BT, scratch disk... (basically everything). I always use TRIM since day one, never ever have any issue from TRIM. However, if you really worry about it. Then you can just use the 850 Evo without TRIM activated. Most likely you will upgrade to another SSD before the 850 die. Also, for normal ops, you should not able to feel the speed difference by enabling TRIM (assuming your normal workflow is not running benchmark).
  8. Oli180 thread starter macrumors newbie

    Aug 14, 2015
    Okay, thanks for all the replies. So I will go with the 850 EVO and hope for a great impact beacuse now my HDD performs 39 mb/sec writing and 4x mb/sec reading with Blackmagic.

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