Intel 750 PCIe NVMe 400GB SSD

i've been testing this sucker with Iometer and CrystalDiskMark and even using this as a boot drive (with resulting overhead) i have to say that i'm a little disappointed with my particular unit's performance.

CDM results:

Sequential Read/Write (MB/s):  1642/994
4KQ32:  836/762
4KQ1: 48/291

i should be getting around 2000 (reads)/1300 (writes) in Sequential benchmarks
4kQ32 performance should be 1900/1300
4kQ1 70/500

Iometer Total I/O per second= 2904
            Total MB/s = 111.16
            Average I/O per second= .3441 ms
            Max I/O per second= 33.5 ms
            CPU Utilization= 1.87%
            Total Error Count= 0

Intel SSD Toolbox says my current pcie link speed for this device is 0x3 and the negotiated pcie link width is 0x2 (that should read 0x4 and is probably where the issue with the performance lies). 

i have confirmed in device manager that the NVMe drivers (version 10.0.10240.16384) are loaded and that the controller for this storage device is using Intel driver version 1.3.0.1007.

my mobo is an Asus z170 Deluxe.  i have water-cooled 980ti's in sli in pcie slots 1 and 2 and the Intel 750 pcie ssd in slot 3.  the ssd SHOULD be running at x4 speed.  i don't believe it is and i don't know why.  does anyone have a guess? 

i get 16 lanes from the cpu and 20 from the chipset.  that should be more than enough to give me full x4 throughput to the 3rd pcie slot.  the only other storage in my system is a SATA Samsung 850 Evo. 

    

i was thinking that as well. 

i also went into the bios and changed the pcie slot 3 from "auto" settings to "x4".  i then ran Intel SSD Toolbox and saw that the negotiated link width had changed from "0x2" to "0x4".  i then ran CDM again and now see my Seq. reads are where they should be (2344 MB/s) but everything else has pretty much remained the same.  i did get a little boost on 4k writes (302 MB/s) but nowhere near what it should be. 

Hi db188,

I'm sorry to hijack your post but I'm desperate.

I have the same mobo Asus z170 deluxe and a Intel SSD 750 pcie 1,2 TB. I can't get the mobo to see the SSD.

I also have an Samsung 950 Pro in the m.2 slot on the motherboard which I use for boot. I just want the Intel SSD to be used as fast storage.

Do you have any pointers on BIOS setup so I can get the Intel SSD recognized?

It in the last PCIe slot. I think its called PCIe16_3.

Hope you can help.

Hi db188,

I just checked my Samsung 950 512Gb M2 with Samsung Magician and got the following.

Seq Read: 2532, Write: 1540

Radom Read: 188021, Write 103118

Frank