If you can get windows onto an intel 750 nvme ..it will boot ..I'm sure the Samsung will be the same.

I installed windows 10 onto an Intel 750 successfully as a UEFI boot. I used the default MS driver and then loaded the Intel driver after the install. I believe the new Samsung will be the same.
Regds, JR

What bios version are you running? What speed is your Ram set to (3000 is currently not very lucky)?

-restored optimized defaults
-rebooted
-re-enabled m.2
-set ram speed to auto (2133 MHz)
-rebooted
-installed 950 pro
-same blinking cursor issue (cant get into bios while the drive is installed either) post code is sitting at "A1"
 
just for the hell of it, i went back in and switched sata mode over to legacy after the above failed on AHCI. had no impact.

Yes uefi is on. I have data drives connected but they don't occupy the connectors that get disabled (the two furthest from the cpu)

I didn't. After enabling m.2 support, I install the drive. While it's installed I see the MB title screen, then the next screen has a blinking cursor that you would typically see if no disk was detected. Post code sits at A1 indefinitely while on this screen.

Trouble is, I can't get into bios while the drive is installed to verify that the drive is showing up. The delete key does nothing when this drive is present. I thought maybe the keyboard wasn't working in that configuration. I even tried a different keyboard in USB 2 and 3 ports. This behavior makes me believe it's a comparability issue with the mobo, and not a faulty ssd from samsung

Sorry, misunderstood your question. I had previously installed windows to a sata drive to get my licence upgraded to 10. That necessitated a bios upgrade to 1.05 since I needed to install Windows 7 first. Regardless, this shouldn't impact the Samsung 950 pro I'm trying to install now. I did turn off the windows 7 support already

To TKMoney: This was the reason I posted this question to begin with. I have the Z170 Classified and the spec sheet states M.2 support up to 36gbps which indicates a M.2 drive with NVMe, but support for NVMe is not specifically stated. I am also interested in the Samsung 950 M.2 drive but didn't want to spend the money if it isn't supported. Hopefully EVGA support will come back with something that helps you out.
 

I'd recommend staying in contact with EVGA support and keep the issue fresh. They have always been very good about working issues out with customers using EVGA products. I'll be watching this thread and see where it goes. Good luck.

@jaaa1976 are you using an evga z170 board?

Interesting... Could you tell me if you still have the windows 7 setting enabled? Also, are you able to get into the bios when the m.2 drive is connected?

I am assuming you are using the m.2 connection on the MB and not a pci extender?

That may be the case for you. I'm not sure if windows 7 can read this drive during installation natively.

I just got my setup working. I now have a Samsung 950 pro running as my primary boot drive running Windows 10 on a z170 mb. I had to disable "CSM" in the Bios which I understand is a compatability tool for older technologies. Since my goal was to run win10. Disabling this wasn't a problem for me.

My current config:
-M.2 support is enabled in the Bios
-UEFI is enabled for sata drives
-CSM is completely disabled (settings for this are at the bottom of the boot tab in the bios. Missed this initially)
-Windows 7 compatability option introduced in the 1.05 version of the bios is disabled.

You know the drive is recognised by the bios from a flashing led located just next to the m.2 - m key slot. There is no mention of the drive itself in the bios, it obviously wouldn't show up in the sata list because it's an m.2 connection. The windows 10 install media recognised the m.2 drive without issue.

I also noticed a significant speed increase in boot time once I disabled CSM!

Hope this helps somebody. Thanks for all the reply's. @jaaa1976 I was about to return the drive when I saw your comment. Gave me some needed hope. The driver windows 10 used for the m.2 drive is "NVMe Samsung SSD 950" provided by Microsoft. Version 10.0.10240.16384

Let me know if you think there is anything else I can contribute.

Well if you plan on upgrading to 10 you could just install Windows 7 to a spare drive, upgrade it to 10. Then pull your new key off the upgraded install with produkey. You can then use win 10 media to do a clean install from a USB like I did

Just looking through the bios. I didn't think it made sense that jaaa1917 could see the drive in windows when I couldn't even get into bios with it installed. Just did some research on CSM then switched it off once I realised it wasn't needed.

It should definitely be off by default on a skylake board in my opinion..

tkmoney The driver windows 10 used for the m.2 drive is "NVMe Samsung SSD 950" provided by Microsoft. Version 10.0.10240.16384

Let me know if you think there is anything else I can contribute.

If I find this driver maybe will be able to install windows 7 on 950 Pro?

I think Im found solutions for install windows 7 on 950 pro  .  Im just copy  solution here
credit go to  Alexandros76  member of tomshardware.co.uk forum
 
After a long week of desperation and anger I did the impossible..... Installed and booted Windows 7 x64 on Samsung SM951 NVMe !!!!!!!!!!!!!!!

I was looking and looking all over the internet for others who might have found a solution but nothing, am I the first who did it?

Installing and booting Windows 7 on this drive simply is impossible there is no driver, no workaround in BIOS settings. 
With windows 8.1 or 10 however it works but I hate them so... for everyone else out there who want to stick with Windows 7 there is a solution but it's not simple.

You have to integrate a Microsoft hotfix in installation so you can boot Windows. 
Unfortunatelly you can't do the same with setup. Instead and simpler is to use Windows 10 setup installation which is updated and contains NVMe driver. It works perfectly.

Keep in mind the native driver is not the best but it works, the SM951 is ultra fast anyway, hopefully when 950 pro is out it's drive will be compatible and better for faster speeds.
What you need:
Windows 7 SP1 x64.iso
Windows 10.iso
Microsoft hotfix    support.microsoft.com/en-us/kb/2990941
NTlite     ntlite.com/download/
First request and download the hotfix, e-mail arrives instantly with a link.
1. Download and install NTlite (or other similar you prefer)
2. Extract the Windows 7.iso to a folder.
If you are installing in UEFI mode, check efi/boot there should be a bootx64.efi. If not grab it from a current installation of Windows 7 x64. C:\Windows\Boot\EFI\bootmgfw.efi copy/paste and rename it to bootx64.efi.
3. Using WinRAR or 7-zip extract the Microsoft hotfix.exe file.
4. Run NTlite and open the iso folder. 
You will see 2 folders your current windows and 2nd the iso folder open and choose the version you want to install, home, ultimate etc. and press load, or right click load. It takes sometime..

4.1 Go to updates and add package file. Add the extracted hotfix Windows6.1-KB2990941-v3-x64.msu
(for experienced users: you can add more updates if you want to avoid downloading the huge list of updates everytime you install windows 7 important to keep install.wim under 4GB due to UEFI/fat32 limitation)

4.2 Go to Apply press Start and wait to finnish.
When it's done close NTlite and go to iso folder and open sources folder.
Delete boot.wim and setup.exe

5. Open Windows 10.iso with winrar and extract the boot.wim to your sources folder of Windows 7.

6. Copy all contents of iso folder of Windows 7 on a usb drive.

Plug, boot and install Windows 7 !!!