There are 2

Storage Controllers
Intel Chipset SATA/PCIe RST Premium Controller
PCI\VEN_8086&DEV_2822&SUBSYS_07BF1028&REV_31
PCI\VEN_8086&DEV_2822&SUBSYS_07BF1028
PCI\VEN_8086&DEV_2822&CC_010400
PCI\VEN_8086&DEV_2822&CC_0104


Microsoft Storage Spaces Controller
Root\Spaceport

____

will add the Disk too (I could not find DeviceID DEV_0116 in the property fields, but seemed close enough to try)

SCSI\DiskNVMe____KXG50ZNV512G_NVM4105
SCSI\DiskNVMe____KXG50ZNV512G_NVM
SCSI\DiskNVMe____
SCSI\NVMe____KXG50ZNV512G_NVM4
NVMe____KXG50ZNV512G_NVM4
GenDisk

MFG link

@Fernando
A test done with OFA driver does dive less ANVIL score [14684] than with Samsung driver [15418].
I do observe to use the F7 touch to bypass driver signature checking. Can we do another way ?

@Fernando

Update driver" > "Browse my computer..." > "Let me pick....". Make sure, "Show compatible hardware" is checked
Intel Chipset SATA RAID Controller
Intel Chipset SATA/PCI RST Premium Controller
Intel Desktop/Worstation/Server Express Chipset SATA RAID Controller

Note, I did not install windows on this laptop

I downloaded files from Dell that matched my service tag
https://www.dell.com/support/home/us/en/...5z0x0n2/drivers

Intel-Rapid-Storage-Technology-Driver-and-Management_66MG5_WIN_15.7.5.1025_A03.EXE
## maybe this changed it to RAID?? I am not sure it was installed before, so maybe it was installed and not upgraded
RAID vs AHCI on dell is discussed below

and disk drive model
Toshiba XG5_nonSED_ KXG50ZNV256G_512G_1T02_C0PF8_ZPE
Toshiba XG5 Non-SED 81F76_ZPE.exe

I had to search on drive name to find the firmware, at least the first ADA4104, then I saw a post mention ADA4105, so I searched ADA4105 on Dell.com and found it.

I saw this post https://www.reddit.com/r/Dell/comments/5...ng_performance/

......My Dell arrived with IRST drivers installed and the controller in RAID mode. This is fairly normal - in fact this is often the fastest configuration on Windows. On my unit, this caused slow performance with the Toshiba drive. Interestingly, for similar cases found on the internet, updating the IRST driver fixed the very same issue for some (but not all) other drives. The version of IRST cited is however older than the one available for the XPS15, and neither reinstalling nor downgrading solved anything for me..........

seems to match up, but haven't tried it yet, but would use your drivers


First we need to switch the controller from RAID to AHCI mode. We need Windows to boot into safe mode after doing this switch, so it'll automagically correct its boot parameters.
To force safe mode, right-click on Windows start menu icon -> Command Prompt (Admin):
bcdedit /set {current} safeboot minimal
Restart and enter BIOS (Hold F2 during boot):
System Configuration -> SATA Operation -> AHCI
Apply
Exit
To get back to normal mode, after Windows boots in safe mode, login, and Command Prompt (Admin):
bcdedit /deletevalue {current} safeboot
Reboot the laptop and login. The controller is now in AHCI mode, running Microsoft's generic driver. Now we update that to the OCZ RD400 driver.
Download and extract driver zip:
Recommended AHCI/RAID and NVMe Drivers
To force using the driver, right-click on Windows start menu icon -> Device Manager
Storage Controllers -> Standard NVM Express Controller
Right-click -> Update driver software...
"Browse my computer for driver software"
"Let me pick from a list of device drivers on my computer"
"Have Disk..."
(extracted driver zip folder)\x64\ocznvme.inf
Select appropriate driver
Next
Click Yes on warning dialog
Allow computer to restart

@Fernando,
Thanks

Is it normal to refer v1.2 for v1.5 OFA ?

Is it normal the Strategies Policies is not as usual ?

@Fernando

maybe my laptop came as configured for RAID (as mentioned in the Reddit post above) but I can't confirm.

Would that explain why may laptop is so sluggish to boot up, it is/was a ~$1,500 laptop. I have a $500 laptop, which I replaced the disk drive with an old SSD - OCZ Vertex 3?, and it boots up and shut down very quick.

I am not doing speed test, just want normal boot and shutdown for a laptop with a solid state drive, this one is slower than ones with a spinning drive.

I have better than average computer skills compare to the average user, but no expert (I am a network engineer, so a little technical) so RAID, AHCI..... are not my strong areas.

Update:

I tried to change it to AHCI, but I got a message that the bitlocker key would be needed, this is a work laptop, I am an admin on it but do not have the key (probably could get it), guess I will just live with the slowness.

I did install your driver on my wife's laptop, a less than 2 year old Dell Latitude 7370. It was the first pc I used with a NVMe drive, still not as fast as the $500 laptop with the old non-NVMe SSD, but a lot faster than my work 5520 laptop (brand new, but Dell now has the 5530 as the newer model.)

@Fernando
After OFA NVMe driver installation my system X99 was not booting properly.
I have had to use the "F7" key procedure (ignore driver signature) to get the PC booting, and then do run ANVIL test for the pure DATA SSD 970PRO 512GB device.
Why this problem ?
As the 970PRO ANVIL score was not better than when Samsung driver is used, I decided to reinstall Samsung v3.0 driver.
Samsung driver reinstallation was OK, but the PC reboot did not work even with the Samsung driver installed.
I have had to full restore the SSD system to come back to a normal boot situation.

Thanks Fernando, we have to wait for a new version of a OFA nvme.sys file be correctly digitally signed.

@Fernando
Thanks for your investigations.
So, at the moment I have to come back to the standard NVMe driver v10.0.17134.81 or Samsung driver v3.0.0.1802 until OFA team does produce a correct NVMe driver.
I do observe my Samsung 970PRO device is stricly conformant to NVMe v1.3 standard, may be OFA team should produce a v1.3 Family branch instead to use a v1.2 Family branch ?
I ignore if a "Community OFA NVMe 1.3 Storport Miniport" is available.