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M.2 samsung 960 evo 256 slow random 4k iops

Hey Guys, i did build a new computer the configuration is :
CPU : I7 7700k
MB: gigabyte z270n wifi
RAM: 1X16 at 3000 but xmp is not enable and is working at 2133
M.2: Samsung 960 evo 256g
VIDEO: 1060

Everything is working perfect but the only problem is that when i run any SSD test the results for seq are good ex. " SEQ 32T1 R: 3203.516, W: 1382.817 " but the random iops are very slow ex. " 4K Q32T4 R: 125.413, W: 124.929 "

samsung magician test
http://imgur.com/n3qktdc

-----------------------------------------------------------------------
CrystalDiskMark 5.2.1 x64 (C) 2007-2017 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) : 3203.516 MB/s
Sequential Write (Q= 32,T= 1) : 1382.817 MB/s
Random Read 4KiB (Q= 32,T= 4) : 125.413 MB/s [ 30618.4 IOPS]
Random Write 4KiB (Q= 32,T= 4) : 124.929 MB/s [ 30500.2 IOPS]
Sequential Read (T= 1) : 2048.280 MB/s
Sequential Write (T= 1) : 1366.065 MB/s
Random Read 4KiB (Q= 1,T= 1) : 43.113 MB/s [ 10525.6 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 80.401 MB/s [ 19629.2 IOPS]

Test : 1024 MiB [C: 22.9% (53.2/232.3 GiB)] (x5) <0Fill> [Interval=1 sec]
Date : 2017/04/30 12:52:52
OS : Windows 10 Professional [10.0 Build 15063] (x64)

I did install Intel driver - " sata + rapid storage " , Samsung driver , i did try everything and i not know where is the problem , M.2 card or the MB , i did update bios of motherboard as well. another thing that i notice is that i test with a normal SSD wdBlue 500 and the random iops was the same around 90 - 100 MB/s . The Spec for this Samsung SSD are 400 MB/s

What do you think guys ? what can be ?

Thank you
Reply to razvanbar
3 answers Last reply Best Answer
More about samsung 960 evo 256 slow random iops
  1. What's your Motherboard?

    Did you clean install or clone?
    Reply to Palorim12
  2. Best answer
    You can try removing the Samsung driver & let Windows drive it with its native NVMe driver. There's often a difference in performance between the two.

    That said, that's REAL low for that drive. Doesn't make sense really. I've seen a lot of posts lately about 960 EVO compatibility issues, and switching to a different NVMe SSD made everything better. However, theirs weren't even working.

    I would try one thing: In crystal diskmark, for random, change the threads to 10. That typically yields the full spec of the drives.
    Reply to marko55
  3. try deactivating your antivirus to me it hellped or uninstalit for the test .

    gl.
    Reply to sascha_20
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