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  1. #1
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    G752VT with 256GB nvme SSD - no drivers / bad benchmark

    Hello Asus-Fans,

    my G752vt with integrated 1tb hdd and 256gb oem ssd (951 nvme i guess?) arrived today.

    I configured/updated windows10 and noticed the extremly bad AS SSD Benchmark.
    Reading seq: 1800MB/S
    Writing seq: 5MB/S (yes it is correct)

    I just disabled "Windows write-cache buffer flushing on the device" and got this results:
    Reading seq: 1800MB/S
    Writing seq: 1200MB/S

    WTF? Is this the ordinary way? How do i know if my ssd work correctly?

    I dont want to get problems because auf faulty drivers or something.
    Sorry iam not a native english speaker.
    Last edited by Cryx; 01-19-2016 at 12:25 AM.

  2. #2
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    what are you using to test it? this is my 950 pro using crystaldiskmark.


    -----------------------------------------------------------------------
    CrystalDiskMark 5.1.1 x64 (C) 2007-2016 hiyohiyo
    Crystal Dew World : http://crystalmark.info/
    -----------------------------------------------------------------------
    * MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
    * KB = 1000 bytes, KiB = 1024 bytes

    Sequential Read (Q= 32,T= 1) : 2510.912 MB/s
    Sequential Write (Q= 32,T= 1) : 1511.359 MB/s
    Random Read 4KiB (Q= 32,T= 1) : 529.712 MB/s [129324.2 IOPS]
    Random Write 4KiB (Q= 32,T= 1) : 269.031 MB/s [ 65681.4 IOPS]
    Sequential Read (T= 1) : 1954.675 MB/s
    Sequential Write (T= 1) : 1488.973 MB/s
    Random Read 4KiB (Q= 1,T= 1) : 44.848 MB/s [ 10949.2 IOPS]
    Random Write 4KiB (Q= 1,T= 1) : 172.507 MB/s [ 42116.0 IOPS]

    Test : 1024 MiB [C: 34.8% (165.4/475.7 GiB)] (x5) [Interval=5 sec]
    Date : 2016/01/18 19:23:36
    OS : Windows 10 [10.0 Build 10586] (x64)

  3. #3
    ROG Guru: Blue Belt Array Gps3dx PC Specs
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    Quote Originally Posted by Cryx View Post
    my G752vt ...
    I configured/updated windows10 and noticed the extremly bad AS SSD Benchmark.
    Reading seq: 1800MB/S
    Writing seq: 5MB/S (yes it is correct)

    I just disabled "Windows write-cache buffer flushing on the device" and got this results:
    Reading seq: 1800MB/S
    Writing seq: 1200MB/S
    Hi there... welcome to ROG's central forum.

    A Short google for "Windows write-cache" and "ssd" gives you this results among others:
    http://www.theeldergeek.com/windows_...e_setup_07.htm
    http://www.samsung.com/global/busine...tepaper12.html

    In short - if you want performance more then data integrity -> disable "Windows write-cache buffer flushing on the device".

    Another thing that you might want to try when running on NVMe drive, is the NVMe driver it self.
    It is known that Microsoft ( MS ) driver is CRAP in terms of performance.... thus it is advisable to try to use Intel's NVMe driver or the driver of your drive (ssd) manufacture.

    also, on another thread, similar topic, users have reported bad performance of Samsung's EVO 950 driver on win10.
    They stated that users with this ssd should wait for a driver update to solve these performance issues.

  4. #4
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    Hello thanks.

    I know what "Windows write-cache" does, but i dont know if its the ordinary way to get my SSD working the way in meant to be.
    ASUS should install the correkt driver itself. Maybe iam a exception and i just need to sent my notebook back for a new one?

    Samsungs 950 pro driver tells me that it can not find any SSD.
    The same issue for "Samsung SSD Magician Tool".
    Last edited by Cryx; 01-19-2016 at 01:08 AM.

  5. #5
    Banned Array JustinThyme PC Specs
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    Laptop (Model)G752VY-DH72
    MotherboardRampage VI Extreme
    ProcessorI9 9940X
    Memory (part number)64GB DDR4 8x8 Corsair Dominator Platinum 3800 MHz @ C17
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    Can you please run a benchmark with crystalmark?
    I'm running a 512GB 950 pro that was installed by cloning the original 256GB SM951 NVMe that came with the machine, I have a G752VY DH72 . I didn't tweak anything and get speeds comparable to what woolfman72 posted using the so called "crap" Windows native NVMe driver. The Intel RST driver you will read everyone posting about is not an NVMe driver, it's the chipset raid controller driver that is also native to this machine out of the box, although there is an updated version that I noted no improvement from. Samsung software and NVMe driver has compatibility issues with seeing past the raid controller. Everyone running the CM236 chipset has had the same experience and it's not isolated to just this chipset or to ASUS products for that matter. I have noted that my benchmarks are also comparable with machines that have been able to use the Samsung driver and Samsung magician software. Write cache should be disabled, there is even a tweak for the in Samsung software that specifically states the SSDs do not use it and it slows performance. Trim Functions and trash are also natively handled by win 8.1 and up. You don't have to worry about over provisioning unless you run your drive close to capacity. If you want to over pro ion you don't need Samsung software for that either. Simply create a partition that's about 10% of your capacity and leave it Unallocated.

    The only thing you can't do without the software is update the drives firmware or use samsungs rapid mode that is over rated IMO. Just FYI the software doesn't see the 850 EVO drive on this chipset correctly either. I posted up some screen shots in the 950 pro new info thread towards the end.
    Last edited by JustinThyme; 01-19-2016 at 04:33 AM.

  6. #6
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    Quote Originally Posted by JustinThyme View Post
    Can you please run a benchmark with crystalmark?.
    Thanks for your reply.
    Seems that the Problem only appears on the AS SSD Benchmark. The Crystal one is fine.


    I dont have any microsoft nvme drivers. The 1TB HDD and the 256gb SSD got the same driver. (See my Picture)
    Shouldn't the driver be different for HDD and SSD?
    I found this Screenshot at Google: http://www.legitreviews.com/wp-conte...controller.jpg
    Miniatura de Adjuntos Miniatura de Adjuntos writecache-enabled.jpg  

    Writecache-disabled.jpg  

    driver.jpg  

    Last edited by Cryx; 01-19-2016 at 01:08 PM.

  7. #7
    Banned Array JustinThyme PC Specs
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    Laptop (Model)G752VY-DH72
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    Graphics Card #1ASUS Strix 2080Ti O11G @ 2.1GHz
    Graphics Card #2ASUS Strix 2080Ti O11G @ 2.1Ghz
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    Sound CardExternal Audioengine D1 24 bit 192kbps DAC
    MonitorASUS PG348Q @ 100Hz
    Storage #1Intel 905P 480GB U2 flavor
    Storage #2Samsung 850 EVO 1TB X2 in RAID 0, 960 PRO 1TB DIMM.2_1
    CPU CoolerHeatKiller IV PRO and VRM blocks ,Dual D5 PWM serial, 2X 480, 1X 360 RADS
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    Awesome!
    From what I see your speeds are actually in the right ballpark. Maybe a little tweaking here and there will make slight improvements to speeds but you are close. I noticed the same with the AS SSD benchmark and came to the conclusion that not everything is working perfectly across multiple platforms. NVMe is new and evolving technology and sometimes being on the cutting edge has its challenges. The drivers you see are actually two very different drivers, they wer just all compiled on the same date with the OS. If you look at the date they are also shown to be very old but NVMe drivers were not present until Win 8.1 which wasnt until well after 2006! The screen grab on legit reviews is for an NVMe controller on a different platform, ASUS X99 Sabertooth motherboard desktop application. It has a controller completely separate just for the NVME plugged into a PCIe slot. What you have is exactly what I have except I installed the latest Intel RST driver.

    I have found that updating the Intel RST drivers will all you to see some of the functions and the drives in Samsung magician although its been noted by several people, myself included, that the 950 pro will show up as a second version of the 850 or an off the wall number. For me appears as an exact duplicate until you look to the size on the right of the screen and it shows that the true 850 is 1TB and the 950 shown as another 850 is 512MB. After the update of the Intel drivers it also has some limitied functionality but noting that you cant accomplish with other means. It will tell you that AHCI is deactivated on the SATA drive, and show N/A for SATA interface.

    You can download 64bit Intel RST AHCI & RAID drivers v14.8.1.1043 WHQL HERE

    Credit to Win-raid forums for the driver

    Simply extract then follow the usual process in device manager to update the driver, just point it to the file you extracted and it grans it right up, no problems. This is the driver for the Intel Chipset Sata RAID controller just so you dont go looking for I RST in device manager.

    One more quick tweak that I can recommended is disabling prefetch and superfetch. These just store some drivers and services in the main memory for faster access as it improved overall machine performance with spinners but causes excessive reads and writes. The speed of SSDs is plenty fast so this is not needed when deploying your OS from a SSD.

    It requires a registry tweak so the usual discalimer applies here to always back up your registry before making changes and proceed at your own risk.

    Type Regedit into the search box next to the start button and select regedit when it pops up at the top. (I save it to the start menu for faster access ater)

    Navigate to the file path "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contr ol\SessionManager\Memory Management\PrefetchParameters"
    Right-click on EnablePrefetcher
    Select Modify and change the value to 0
    Right-click on EnableSuperfetch
    Again Select Modify and change the to 0
    Restart

    All done


    Hope you are able to use at least some of this. It all works for me on a G752 DH72
    Last edited by JustinThyme; 01-19-2016 at 02:15 PM.

  8. #8
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    Thanks JustinThyme,

    its good to know iam not the only one.
    I updated the Intel RST AHCI & RAID driver as you said.

    AS SSD seems broken. https://www.reddit.com/r/Surface/com...test_your_ssd/)
    Surface User,s got the same problem.

    The only thing iam worry about is, that there is no nvme driver. No ssd-tools recognize the SSD.
    Also I dont think Windows 10 recognize it as nvme one. I cant believe this is the correkt Windows nvme driver.
    Maybe iam wrong. I will keep the notebook and maybe ASUS will update some drivers soon.

  9. #9
    Banned Array JustinThyme PC Specs
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    Laptop (Model)G752VY-DH72
    MotherboardRampage VI Extreme
    ProcessorI9 9940X
    Memory (part number)64GB DDR4 8x8 Corsair Dominator Platinum 3800 MHz @ C17
    Graphics Card #1ASUS Strix 2080Ti O11G @ 2.1GHz
    Graphics Card #2ASUS Strix 2080Ti O11G @ 2.1Ghz
    Graphics Card #3ROG Nvlink
    Graphics Card #4Have to feed animals
    Sound CardExternal Audioengine D1 24 bit 192kbps DAC
    MonitorASUS PG348Q @ 100Hz
    Storage #1Intel 905P 480GB U2 flavor
    Storage #2Samsung 850 EVO 1TB X2 in RAID 0, 960 PRO 1TB DIMM.2_1
    CPU CoolerHeatKiller IV PRO and VRM blocks ,Dual D5 PWM serial, 2X 480, 1X 360 RADS
    CasePhanteks Enthoo Elite 8X LL120 PWM, 3X LL140 PWM, 12 SP120 PWM 1x AF140 PWM
    Power SupplyCorsair AX 1500i
    Keyboard ASUS Claymore
    Mouse ASUS Spatha, Logitech MX Master
    Headset Sennheiser HD 700
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    Its being recognized as an NVMe drive and using the correct Win 10 default drivers for it. That number and date is on most of the default drivers for the OS. The Samsung tools dont see the 850 EVO SATAIII SSD on this platform either and IMO are over rated. The only thing that the Samsung software can do that you cannot by other means is update the SSD firmware. Also this is not limited to ASUS nor do I see it as their problem. Like everyone else they source the chipset elsewhere. This one happens to be Intel CM236. Of course also like anywhere else you get the finger pointing game of whose fault it is that one thing wont work with the other.

    In the end, note that Samsung drivers and Samsung Magician do not ship with any PC that employs Samsung drives, NONE! Doesn't matter who makes it. Samsung summarily declines support for OEM SSDs and directs you to the manufacturer. The software and drivers are marketed at the consumer purchase level such as the SATAIII drives and the 950 pro and dont work on those either across multiple platforms.

  10. #10
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    Justin
    I have read a lot of your posts here and have a question. I am getting my G752VY-DH72 and 950 pro tomorrow. So should I just put the 950 in secondary slot and clone primary that it shipped with to it? Is that better than a clean install?
    If so what cloning software did you use? The Samsung migration tool?

    Also can I put another m2 ssd in the secondary slot and use it as well? I would have the 950 in primary, a 512 m2 in secondary and a 2tb sata III.

    One more thing is that when i clone the 256 that it shipped with to my 512 950 pro I'll have unpartioned space on the 512 right? I can expand that to the main partition?

    Thanks for any feedback u can give.

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