@Fernando

As a reference, I have attached the images of BIOS settings. Am I missing something?

I have tried AHCI controller as well as NVMe controller(IMG_1780). No luck still in booting.

Another guy with the same problem only difference being, his SSD seems to be Toshiba XG3. http://www.tomshardware.com/answers/id-3...shown-bios.html

Regarding the images, I don't know why appear 'rotated' and zoomed. I didn't upload them like that. Anyway I'll try to upload them again.

@Fernando

I have the same motherboard as he does. Even I can't see it inside BIOS. When I'm using a bootable USB flash drive, SSD is detected.

Could it be that a particular SSD manufactuirer (Toshiba/OCZ in my case) omitted to provide support as bootable device other than when used in their own laptops (Dell/Lenovo)??

Maybe I got a dud. In any case I am able to use it like any other drive--I can view it, copy files from/to it, from within Windows(that is installed on the SATA SSD) but that is all, just can't boot from it.

Recommended AHCI/RAID and NVMe Drivers @Fernando

I am trying to install the one signed and modded by you>>Toshiba XG4. It shows a message saying 'Its not digitally signed'. Also I read a couple post back in this thread that you 'have to import cetificate'. I got this far but I don't know how to import certificates first(I located the folder) but I stopped short of installing. Thought it wouldn't hurt to confirm with you once.

This is the error message I got when I tried to install the driver. How do I import ceritficates ?

Hi guys,

Ive faced exactly same troubles like "RadicalSquadron" but finally I resolved.
After that story seems to me that Gigabyte isnt perfect company for NVME/UEFI/bios developement/support or any intelligent guidence.

Anyway see below for simple guide, if anythying unclear let me know. Most probably there should be more available solutions, but this works for me.

Used HW :
Gigabyte Z97X Gaming3
NVME Toshiba THNSN5512GPUK - installed into motherboard M2 slot
AHCI SATA WD VelociRaptor WD3000HLFS 300GB drive

1. set within bios :
- Windows Features to "Windows 8"
- SATA mode selection to AHCI /at this time Toshiba drive will not be visible/discovered in bios
- Storage boot option to "UEFI only"

2. to prepare and install bootable USB OS Win10 64bit/GPT / at this time Toshiba drive will not be visible/discovered in bios, but will be discovered in OS boot manager
- in boot manager I manually installed mb_driver_intel_bootdisk_irst_64_w10 drivers (this step maybe no needed, as drive been normally visible)
- during initial setting in Windows boot manager you dont need to define any partitions/formats. You can choose "unallocated" drive, OS will generate own needed partitions and formats automatically upon "Next" button confirmation.

3. after complete installing of OS onto drive and first system restart, go to bios :
- remove installation USB and other USB drives
- change setting from AHCI to RAID mode for M.2, means. SATA Mode Selection option to "RAID" / after those steps and cmos saving/restart, the drive will be finally visible/discoverable by bios via Windows Boot Manager (THNSN.........)

4. just wait until UEFI will boot to succesfully onto OS environments

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Hello everyone,

Apologies for the late update on this post.

NVMe booting from Z97 motherboard has been a pain in the neck. But I have been able to successfully boot from it using Clover-EFI Bootloader Method.

Gigabyte does claim to have native NVMe boot support but the support person can't even point towards the settings to be used to be able to do boot properly. They were very insistent on the PCIe Addon Card that I used to be the source of the problem. But I was pretty sure that wasn't the case(LinusTechTips was using the same one). Suffice it to say they weren't the most helpful.

Hardware used:
Gigabyte Z97x Gaming 3 Rev 1.1
Toshiba 256gb THNSN5256GPUK
Silverstone ECM20

Helpful links found in the process:
(1)[Guide] NVMe-boot without modding your UEFI/BIOS (Clover-EFI bootloader method)
(2)http://www.dell.com/support/home/in/en/i...?driverId=T0X0P
(3)http://www.dell.com/support/article/in/e...-drives?lang=en
(4)Recommended AHCI/RAID and NVMe Drivers

@Fernando Absolutely no problem at all. I had some personal stuff to take care of that's why even that small write up took so long.

Regarding your questions,
1. I have installed Windows 10. I tried to boot using this SSD on another motherboard-Asus Z97 Wifi AC. No luck. Tried to boot it from the on-board M.2(only PCIe 2.0 X2 speeds). Didn't work on that too. I don't think the manufacturers have provided NVMe boot support on earlier motherboards except where they DO mention in BIOS updates(as in X99 chipsets).
2. RD400, I am using. I think I should be using XG4 actually. All the drivers are signed by you.
3. No. I am not running Windows 7 currently.
4. Yes. I did proceed like you had directed. In BIOS, selected within windows 8 feature>Other OS. And had disabled Secure boot prior to installation. Used Clover this time. WORKS LIKE A CHARM!!

Using RD400 NVMe driver, the SSD gave me read speeds of over 1.7GB/s and write of about 800MB/s. This is was as seen on OCZs SSD Utility software(screenshot below). Interestingly enough, Crystal disk mark shows only around 400MB/s of write speed. I think I remember seeing 800MB/s with the XG4 driver. Nevertheless thought I'd post my findings here. @Fernando

EDIT: Tried it with XG4-Dev 0115 driver write speeds were around 270MB/s. So reverted back to RD400.