Imac 21.5 (Late-2013) SSD Upgrade

Discussion in 'iMac' started by memz5k, Dec 19, 2016.

  1. memz5k macrumors newbie

    Joined:
    Nov 18, 2014
    #1
    Hey all.
    I want to do an SSD upgrade on my Imac, the current HDD is slowing it down way too much.

    I wanted to know if i purchase an Samsung 850 SSD and install it, just by replacing the stock HDD would the fans go crazy constantly and run at full speed.

    Or

    If i purchase an OWC SSD would the same issue occur, as ive red online that OWC have the custom firmware to give the thermal reading to the sensor to stop this fan issue.
     
  2. RichardC300 macrumors 65816

    RichardC300

    Joined:
    Sep 27, 2012
    Location:
    Chapel Hill, NC
    #2
    No. I did an SSD and RAM upgrade on a late 2013 21.5" iMac two weeks ago. No thermal sensor needed. This thing is FAST now! I used a crucial MX300 SSD and crucial RAM, no issues. The whole machine was slow and VMs ran at a snail's pace before, but now, everything is smooth and almost instant.
     
  3. memz5k thread starter macrumors newbie

    Joined:
    Nov 18, 2014
    #3
    Thanks for the info. I have ordered the Samsung 850 Evo 500gb, the price difference between the MX300 & 850 Evo was minimal.
     
  4. mbosse macrumors regular

    Joined:
    Apr 29, 2015
    Location:
    Vienna, Austria
    #4
    Do the fans work properly afterwards or is a software control necessary? Kind regards, Magnus
     
  5. RichardC300 macrumors 65816

    RichardC300

    Joined:
    Sep 27, 2012
    Location:
    Chapel Hill, NC
    #5
    For this model, yes. The fans work normal, and a thermal sensor adapter or software control is unnecessary. I can't remember which years need that piece, but if you have a late-2013 21.5", you're good without it.
     
  6. vyruzreaper macrumors member

    Joined:
    Jul 19, 2015
    #6
    Good choice. I bought a USB 3 enclosure and just boot the drive externally. No need to deal with the hassle of opening the imac. I still get great speeds. Gimme 5 and I will do a BM test... stay tuned
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  7. tubeexperience macrumors 68030

    Joined:
    Feb 17, 2016
    #7
  8. Fishrrman macrumors G4

    Fishrrman

    Joined:
    Feb 20, 2009
    #8
    RE post 6 above:
    "Good choice. I bought a USB 3 enclosure and just boot the drive externally. No need to deal with the hassle of opening the imac. I still get great speeds. Gimme 5 and I will do a BM test... stay tuned"

    433+/-mbps is about "the theoretical max" for reads via a USB connection that supports UASP.

    You're very close, doing fine!
     
  9. nambuccaheadsau macrumors 6502a

    nambuccaheadsau

    Joined:
    Oct 19, 2007
    Location:
    Nambucca Heads Australia
    #9
    Further from the 2012 iMac, Apple in their wisdom, reduced the 3.5" HDD in 21.5" models to a slow old 5400rpm 2.5" laptop HDD. As tubee says, heat sensor only required for 27" model from 2012.
     

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