2017 27" iMac SSD Speeds

Discussion in 'iMac' started by just!ns, Jun 18, 2017.

  1. just!ns, Jun 18, 2017
    Last edited: Jun 18, 2017

    just!ns macrumors newbie

    Joined:
    Dec 27, 2016
    #1
    Has anyone had a chance to run write/read tests on their new 2017 iMac's 512MB or 1TB SSD? If so, please post your results!
     
  2. freebo27 macrumors newbie

    Joined:
    Jun 8, 2009
    #2
    Blackmagic 2080 write and 2383 read,

    This is i7/512SSD/40GB Ram
     
  3. just!ns thread starter macrumors newbie

    Joined:
    Dec 27, 2016
    #3
    Nice! Thanks for testing. Looking forward to picking up the base 27" with the 512 SSD. I'm impressed with my 2016 13" MBP's 1350 write and 2160 read (using AJA) ... 2080 write will be even better!
     
  4. Traverse macrumors 603

    Traverse

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    Mar 11, 2013
    Location:
    Here
    #4
    I thought the 15" MacBook Pro had 3GB speeds, disappointed this doesn't.
     
  5. Moriarty macrumors 6502

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    Feb 3, 2008
    #5
  6. keysofanxiety macrumors 604

    keysofanxiety

    Joined:
    Nov 23, 2011
    #6
    Up to; it's difficult to fully saturate it so it's unlikely you'll get the full banana at any given point. However Flash chips on the Macs work in parallel so the larger the storage, the quicker the speeds.

    Generally if you're looking for something close to the quoted speeds you'll need the 1TB.
     
  7. Ylan macrumors member

    Ylan

    Joined:
    Oct 27, 2016
    Location:
    Stockholm
    #7
    Would there be a significant difference between 512 GB and 1 TB? I mean significant in the sense that the latter would postpone the need to upgrade down the line?

    Humbly, Ylan
     
  8. keysofanxiety macrumors 604

    keysofanxiety

    Joined:
    Nov 23, 2011
    #8
    Ehh well 512GB is still a best of a performer. The only thing I can think of with regards to longevity would be the storage space; more storage means less need to use external storage.

    Otherwise the 512GB is still an absolute beast, so feel free to get what you feel is best. :)
     
  9. SaSaSushi macrumors 68040

    SaSaSushi

    Joined:
    Aug 8, 2007
    Location:
    Takamatsu, Japan
    #9
    Exact same spec'd iMac I am getting very similar 2000 write and 2350 read. I'll take it.
     
  10. Coz007 macrumors newbie

    Joined:
    Jun 19, 2017
    #10
    I am conflicted between the 256 and 512. I am not concerned so much about storage space as I will be purchasing an external drive in the near future for my bigger files. I was more concerned with whether I would see a huge speed difference in everyday tasks. Opening apps, web browsing and stuff like that. Thank guys!!

    Also if anyone has any benchmarks on the 256 that would be great!!
     
  11. Ylan macrumors member

    Ylan

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    Oct 27, 2016
    Location:
    Stockholm
    #11
    If money was not an issue, 2 TB would be best. It is however, regrettably an issue. :(

    Humbly, Ylan
     
  12. keysofanxiety macrumors 604

    keysofanxiety

    Joined:
    Nov 23, 2011
    #12
    It's okay though, 512 is still an utter screamer. You won't have any performance issues.
     
  13. Luxtrau macrumors member

    Joined:
    Jun 16, 2017
    Location:
    Germany
    #13
    I got 1TB SSD and speed is very close to yours with 512GB.
     
  14. MJForever23 macrumors newbie

    MJForever23

    Joined:
    Nov 16, 2016
    #14
    I have new 27 inch iMac (basic model) 3.4G 8GB RAM 256G SSD with Radeon 570.

    My 256G SSD only got 1400 MB/s write and 2100 MB/s read

    Is it normal ?
     
  15. EugW macrumors 6502a

    EugW

    Joined:
    Jun 18, 2017
    #15
    Smaller capacities often have slower speeds so that's not surprising.
     
  16. MJForever23 macrumors newbie

    MJForever23

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    Nov 16, 2016
    #16
    Really? plan to order 512G SSD instead of 256G SSD just for $250 more. Looks worth it.
     
  17. geoelectric macrumors 6502

    geoelectric

    Joined:
    May 19, 2008
    #17
    Y'all are absolutely terrible for my pocketbook. I just cancelled the order with the 3TB Fusion for a 1TB SSD. I'd have gone 512GB and saved a few hundred, but the wait time was nearly a month longer.

    But once I realized the fastest external SSD I was going to be able to put on it was a fraction of the speed for more money, more hassle, and more risk and heat from the Fusion Drive...getting a maxed i7 with the Fusion just seemed too much like putting Prius tires on a Corvette. Luckily my wife understood that argument too!
     
  18. cynics, Jul 4, 2017
    Last edited: Jul 4, 2017

    cynics macrumors G3

    Joined:
    Jan 8, 2012
    #18
    Yes but its not so much a problem anymore. The issue was NAND was accessed in parallel and to increase capacity more NAND chips were added so larger capacity SSDs tended to be faster.

    Now with various chip capacities, layers, types, etc etc most name brand name manufactures have fairly close performance regardless of capacity. Samsung 850 EVO (SATA SSD) varies by around 5mbps between 120gb, 250gb, 500gb, 1tb and 2tb. There 960 PRO (PCIe SSD) are similar as well.

    There was a time moving from 128gb to 256gb could literally double performance. And you can still see that in some SSDs now. The new problem is since the tech has developed and everyone has them the cheapest wins, so now you can find speeds all over the place and larger SSDs (same brand and model) being slower than their smaller counterparts. Just for example the Adata SX8000 512gb SSD has a read speed of around 1200mbs, the 256gb version is over 1400mbs.
     
  19. fathergll macrumors 6502a

    Joined:
    Sep 3, 2014
    #19

    Well thats beating my 283 write and 446 read on a 256 GB 2012 MacBook Air:oops:
     
  20. PieTunes macrumors 6502

    PieTunes

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    May 6, 2016
    Location:
    San Diego, CA
    #20
    Join us. The 2017 iMac is calling your name. One of us... one of us...;)
     
  21. cityboy-100 macrumors member

    Joined:
    Jun 5, 2016
    #21
    I didn't realize the 512gb disks were on back-order, I think I would rather pay more to get the machine sooner in that case :/
     
  22. EugW macrumors 6502a

    EugW

    Joined:
    Jun 18, 2017
    #22
    You get the same killer SSD speeds in the MacBook Pro now too. Even my 256 GB MacBook 2017 has write speeds well over 1000 MB/s.
     
  23. Glideslope macrumors 601

    Glideslope

    Joined:
    Dec 7, 2007
    Location:
    NY
    #23
    LOL. Yes, my wife was very flexible in the negotiations as well. :rolleyes:
     
  24. geoelectric macrumors 6502

    geoelectric

    Joined:
    May 19, 2008
    #24
    That was certainly my conclusion.
     
  25. Chancha macrumors 6502

    Joined:
    Mar 19, 2014
    #25
    i7, 1TB, 40GB RAM
    2016MB/s write, 2352MB/s read

    Originally was going to get only the 512, then looked at the Time Machine drive that was going to be migrated and it was 300+GBs, worrying about not enough headroom for foreseeable future and pulled the trigger. 1TB option is pricy, but well worth it if you need it.
     

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