Replace Fusion Drive with SSD?

Discussion in 'iMac' started by Macintosh1984, Oct 1, 2017.

  1. Macintosh1984, Oct 1, 2017
    Last edited: Oct 1, 2017

    Macintosh1984 macrumors regular

    Joined:
    Dec 15, 2012
    #1
    Hi!

    Do you think that I can get more speed if I replace Fusion Drive on my iMac Late 2012 with a pure SSD?

    What SSD is the best at the moment?

    Alternatively, can I get better performance with an external SSD thunderbolt 1 or USB 3.
     
  2. Khaleal macrumors newbie

    Joined:
    Aug 24, 2013
    #2
    2012 models had 128GB SSD which is plenty for FD configuration. I won't bother as it's hard to tell the difference between pure SSD and FD unless you'r moving a lot of huge files.
     
  3. Macintosh1984 thread starter macrumors regular

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    Dec 15, 2012
    #3
    Yes, I know about 128GB, I would say in the case that today SSD were now more powerful than the Fusion Drive 2012 solution.

    External solutions are also valid, if better than Fusion Drive internal.
     
  4. nambuccaheadsau macrumors 6502a

    nambuccaheadsau

    Joined:
    Oct 19, 2007
    Location:
    Nambucca Heads Australia
    #4
    Go with an external drive and when the OS is installed, select it as the boot drive in Startup Disk > System Preferences. USB3 will be fast, but a little slower than a TB drive having used both this way.
     
  5. tyche macrumors 6502

    Joined:
    Jul 30, 2010
    #5
    Run Black Magic benchmark to see how fast your drive is. sata 3 ssd is going to be around 550 MB/s. TB 1 not sure but maybe 50% faster but depends on quality thunderbolt enclosures.

    Get a reading on your fusion drive and it makes it easier to make a recommendation.
     
  6. Macintosh1984 thread starter macrumors regular

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    Dec 15, 2012
    #6
    If I remember Fusion Drive not full, write 320 MB/s, read 410 MB/s.

    Now, Fusion Drive full, write 245 MB/s, read 405 MB/s.
     
  7. EugW macrumors 68000

    EugW

    Joined:
    Jun 18, 2017
    #7
    Personally I'd just split the Fusion drive and put the OS on the 128 GB SSD, and put less accessed data on the HD.
     
  8. Macintosh1984 thread starter macrumors regular

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    Dec 15, 2012
  9. Macintosh1984 thread starter macrumors regular

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    Dec 15, 2012
  10. Fishrrman macrumors G4

    Joined:
    Feb 20, 2009
    #10
    If the iMac has USB3, you can add an external SSD and you will see read speeds of 430+mbps.

    You can buy a "bare" SSD and put it into an enclosure or dock (BE SURE that the enclosure or dock is SPECIFICALLY STATED to support "UASP").
    or...
    You can buy a "ready-to-plug-in" drive, such as this:
    https://www.amazon.com/exec/obidos/ASIN/B00ZTRY532?tag=delt-20

    Then boot and run from the external SSD, using the internal fusion drive "as is" for additional storage.
     
  11. J.Gallardo, Oct 13, 2017
    Last edited: Oct 13, 2017

    J.Gallardo macrumors member

    J.Gallardo

    Joined:
    Apr 4, 2017
    #11
    You can try external SSD trough Thunderbolt (usb-C) to gain a little more efficiency vs usb3.
    Big speed gains can be achieved playing with RAID 0 config, also. Sandisk makes an external Thunderbolt ssd (“Extreme 900” I think it’s named) with read/write at ~900Mb/s (it’s got two ssd’s in RAID 0).
    Sonnet is about to launch an external ssd with crazy fast speed.
    http://www.sonnettech.com/product/fusiontb3pcieflashdrive.html

    (Oh... Sorry; I forgot you haven’t Thunderbolt 3. I leave the comment, as the info could interest someone. Anyhow, two linked ssds in RAID 0 can reach faster speed)
     
  12. Macintosh1984 thread starter macrumors regular

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    Dec 15, 2012
    #12
    Thanks!
     
  13. nambuccaheadsau macrumors 6502a

    nambuccaheadsau

    Joined:
    Oct 19, 2007
    Location:
    Nambucca Heads Australia

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