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Brand New Samsung 850 EVO 250GB, VERY Low Random Read/Write (IOPS)?

Just installed and migrated my OS from my 840 120 to my new 850 EVO 250 GB.. My sequentials are through the roof thanks to RAPID mode, but my IOPS are around a third of what they should be. I had the same problem with my 840. Any idea?

Reply to thecynicalmonk
23 answers Last reply Best Answer
More about brand samsung 850 evo 250gb low random read write iops
  1. Is it plugged into a SATA II or SATA III port?
    My 840 EVO plugged into a SATA II port gets almost that exact same Random Read/Write performance.
    The other 840 EVO in a SATA III port is significantly faster.
    Reply to USAFRet
  2. USAFRet to save the day! :)

    That's the strange thing, all i have are SATA 3 ports...

    http://www.hardwaresecrets.com/printpage/ASUS-M5A97-R20-Motherboard/1772
    Reply to thecynicalmonk
  3. Just updated my drivers to the Omega Chipset drivers. No change

    Reply to thecynicalmonk
  4. Check the disk with ATTO Benchmark.
    Reply to Rebu
  5. Rebu said:
    Check the disk with ATTO Benchmark.


    What settings should i use?
    Reply to thecynicalmonk
  6. Here are my results with default settings shown

    Reply to thecynicalmonk
  7. Sorry, I wanted to say AS SSD Benchmark. In ATTO Benchmark the values by default but check with AS SSD benchmark, it's easier.
    Reply to Rebu
  8. Even though all of your SATA ports are SATA 3 (6Gb/s), connect the drive to another SATA port and see if that improves your benchmark scores.

    Connect the drive to port SATA6G_1 if it is not there already.
    See page 1-6 of your motherboard manual for the location of the port.
    Reply to Dereck47
  9. Dereck47 said:
    Even though all of your SATA ports are SATA 3 (6Gb/s), connect the drive to another SATA port and see if that improves your benchmark scores.

    Connect the drive to port SATA6G_1 if it is not there already.
    See page 1-6 of your motherboard manual for the location of the port.




    Current Layout

    It's already connected to SATA6G_1

    All other connections are SATA6 as well


    Reply to thecynicalmonk
  10. thecynicalmonk said:
    Here are my results with default settings shown



    This result is quite strange... the highest transfer rate should be 540 for reading and 520Mb/s for writing. This is the results on my 840 EVO 256Gb.

    Reply to Rebu
  11. Rebu said:
    Sorry, I wanted to say AS SSD Benchmark. In ATTO Benchmark the values by default but check with AS SSD benchmark, it's easier.


    MB/s



    IOPS

    Reply to thecynicalmonk
  12. Rebu said:
    thecynicalmonk said:
    Here are my results with default settings shown



    This result is quite strange... the highest transfer rate should be 540 for reading and 520Mb/s for writing. This is the results on my 840 EVO 256Gb.






    Sorry, I don't follow. Are you saying its running significantly slow?

    Edit: Wow! Mine are WAY off.

    Any idea what could cause this? Bad mobo?
    Reply to thecynicalmonk
  13. Disable the RAPID Mode, it's only marketing. The rapid mode charge temp files in the ram to improve the result in benchmarks.
    Reply to Rebu
  14. thecynicalmonk said:
    Rebu said:
    thecynicalmonk said:
    Here are my results with default settings shown



    This result is quite strange... the highest transfer rate should be 540 for reading and 520Mb/s for writing. This is the results on my 840 EVO 256Gb.






    Sorry, I don't follow. Are you saying its running significantly slow?

    Edit: Wow! Mine are WAY off.

    Any idea what could cause this? Bad mobo?


    That's why I think that there is an error in the config or features of the SSD. 3000Mb/s in SATA 3 ssd? I want it too.
    Reply to Rebu
  15. Rebu said:
    thecynicalmonk said:
    Rebu said:
    thecynicalmonk said:
    Here are my results with default settings shown



    This result is quite strange... the highest transfer rate should be 540 for reading and 520Mb/s for writing. This is the results on my 840 EVO 256Gb.






    Sorry, I don't follow. Are you saying its running significantly slow?

    Edit: Wow! Mine are WAY off.

    Any idea what could cause this? Bad mobo?


    That's why I think that there is an error in the config or features of the SSD. 3000Mb/s in SATA 3 ssd? I want it too.


    Well, I just disabled RAPID mode.. and its not any better.

    Lots of Benchmarks:

    Samsung Benchmark


    Samsung Benchmark: Comparison between before and after RAPID mode. (Dark blue is after)


    ATTO No RAPID


    AS SSD No Rapid (IOPS)


    AS SSD No Rapid MB/s


    EDIT:
    My random Read/Write should be 97000 and 88000 respectively.

    THAT is what I'm trying to fix
    Reply to thecynicalmonk
  16. Well, the values of Sequential Write and Read are normal. Do you have 25Gb of your ssd free or "over provisioning" active?
    Reply to Rebu
  17. Best answer
    I've been reading in internet for this problem, i have found a review of the disk (512Gb - Not 256Gb) http://benchmarkreviews.com/23506/samsung-ssd-850-evo-solid-state-drive-review/4/

    Check the disk with CrystalDisk Info, if the disk is healthy I dont know what's the problem, sorry :(
    Reply to Rebu
  18. Rebu said:
    Well, the values of Sequential Write and Read are normal. Do you have 25Gb of your ssd free or "over provisioning" active?


    Rebu said:
    I've been reading in internet for this problem, i have found a review of the disk (512Gb - Not 256Gb) http://benchmarkreviews.com/23506/samsung-ssd-850-evo-solid-state-drive-review/4/

    Check the disk with CrystalDisk Info, if the disk is healthy I dont know what's the problem, sorry :(


    Well, I think thanks to your link I have figured it out... when RAPID is active I am getting nearly identical benchmarks to benchmarkreviews.com

    Theirs


    Mine with RAPID


    Conclusion: Samsung Magician seems to be VERY temperamental and not trustworthy... as it seems to be with "out of the box" manufacturer benchmarks. I hoped that it would be reliable to test my Samsung SSDs, but it seems that the Open Source Community has won again!

    Thank you to Rebu, Dereck47, and USAFRet for the help in finding this out. I will give Rebu the best answer since he led me to discover this. THanks again guys!

    Monk
    Reply to thecynicalmonk
  19. I hate to bump this but I have the exact same problem. Except when I stick this drive into my friends computer who is running Intel, he gets much faster speed all the way around. Even though I have the faster computer. I think its error with AMD cpu's or something
    Reply to shadycuz
  20. Scratch that, it's a problem with this MB, I have the exact same one monk, and I have tried everything to get it to work.
    Reply to shadycuz
  21. Reply to shadycuz
  22. Here are several hundred user benchmarks for the 250GB 850 Evo:
    http://ssd.userbenchmark.com/Samsung-850-Evo-250GB/Rating/2977

    if you run the benchmarking software:
    http://www.userbenchmark.com/Software

    you can compare your results to the results from everyone else and see if your drive is working normally.
    Reply to whoratesit
  23. I also have the same SSD (850 Evo 250gb) and I encountered both low IOPS scores and high (97000/88000) IOPS scores on my system

    low IOPS score happens when App Center (set of utilities from Gigabyte motherboard "Easy Tune" and "SIV") is running in the background.

    Luckily out of an unfortunate event after I update the MB BIOS it make the App Center out of date and unable to run.

    That is when the high IOPS scores happens.

    So, the 850 Evo really does the 97000/88000 IOPS without RAPID it was just being used, while with RAPID enabled it goes unreasonably high scores...

    Try uninstalling your MB utilities and run the benchmark, will provide images later,

    https://www.dropbox.com/s/ds1wjqki4a8wdo7/850%20EVO%20Rapid%20on.jpg?dl=0
    Reply to JCarlo1222
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