Installing Win7 x64 on Samsung 950 Pro NVMe

Hello everyone,
I am having trouble in installing Windows 7 x64 on my Samsung 950 Pro. My configuration is the following:

Asus P9X79 Deluxe, Intel i7 SB-E 3930k @ 4500 Mhz, 64GB Corsair Dominator DDR3 1600 Mhz, Corsair AX1200i PSU, x2 Gigabyte 980ti SLI, Intel 750 Nvme 400Gb, Samsung 950 Pro Nvme 512 Gb, Samsung 850 Pro 256 Gb, Noctua NH-D15.

I possess both the Intel 750 400gb NVMe and the Samsung 950 Pro. Both of them can install Win 8.1 and 10 without problems, but I would need to use Windows 7.

What I tried so far:
-Created a bootable USB drive with Rufus.
-Created another usb with the Samsung NVMe drivers on it.
-Removed all the other drives from the system.
-Removed the "secure boot" option from the bios.

The problems are the following:
-My Win 7 iso is x64, but when I try to create a bootable usb with Rufus in GPT, it says that the ISO file is Larger than 4Gb so I cannot select FAT32.
-If I use MBR partition scheme the installation does not even load when I reboot, saying "insert media disk".
-If I create a bootable usb with the Windows 7 USB DVD tool, the installation starts but fails to accept the NVMe drivers, saying "they are not signed".

I read several threads and don't know exactly what I am missing here. I know there is the possibility to install Win 7 onto a standard ssd (I also have a 850 Pro so I could use that one) and then clone it to the 950, but if possible would prefer sticking with a normal installation.

Do you guys have any suggestions?
Thanks in advance.

The fact that the drivers are refused as unsigned is concerning. Where did you get them?

Best guess is that you need to integrate certain updates (in particular there is an NVMe update, and some driver framework updates) into the install images.

CarloR said:

My Win 7 iso is x64, but when I try to create a bootable usb with Rufus in GPT, it says that the ISO file is larger than 4Gb so I cannot select FAT32.

You should use the official Windows 7 ISO from Microsoft.

CarloR said:

Do you guys have any suggestions?

Asus UEFI BIOS - Use the following settings when you install Windows 7 (UEFI mode or Legacy BIOS mode).
- Boot > CSM (Compatibility Support Module) > Launch CSM > Enabled (Default)
- Boot > Secure Boot > OS Type > Other OS (default: Windows UEFI mode) https://www.asus.com/support/faq/1016356/

If you have a Samsung M.2 SSD (for example, Samsung 950 PRO) then you will need to download the Samsung NVMe drivers. You can download drivers from the link below.

Recommended AHCI/RAID and NVMe Drivers

"Samsung NVMe Drivers"
- Note: Get the pure driver files, not the installer set.
- Open your Windows 7 USB flash drive and create a folder named “nvme” in the root of the drive.
- Copy all of the NVME driver files you just downloaded to this folder.

You must boot the installation media as a UEFI device, if you want to use GPT instead of MBR in system disk.
- Reboot PC and enter the Boot Menu by pressing F8.
- Select the name of your Windows 7 USB flash drive. When you have CSM enabled in UEFI BIOS you will see it twice, but one will have a UEFI: prefix, select that.

1. Click through the initial windows setup pages, selecting your language and then press “Install Now”.
2. After accepting the License Terms, under “What type of installation do you want”, select ‘Custom (advanced)’.
3. You’ll now see a list of drives and partitions on your computer. If you have a non-NVME secondary drive, it will be listed here – but since Windows 7 does not yet have drivers installed for NVME, it won’t recognize any NVME SSDs. Let’s fix that.
4. Click: ‘Load Driver’ below the list of drives.
5. Select Browse, and then expand the thumb drive (Likely labeled ‘Removable Disk’).
6. Select the ‘nvme’ folder, and press OK.
7. You should now see a Samsung NVME Controller. Select this driver and press ‘Next’. The driver will be installed.
8. Once complete, and you’ll return to the disk selection screen and should see the NVME SSD (you may have to click refresh).

@ alphaniner: Thanks for the reply alphaniner. The drivers I am using are the official Samsung NVME, I do not know why it gives me that message.

@ Osprey: My ISo is an AIO but the Windows I would like to install is 64 bit Ultimate. Thanks so much for the detailed instructions, I will try and follow that process.

@ AddRAM: Thanks for the reply and the suggestion AddRAM. I generally do not game on this pc. I am aware of the problem you are mentioning, and it is definitely correct in general for some motherboard with a limited number of pci lanes. However, the X79 motherboard I have has 40 pcie lanes, which should be more than enough considering that the 2 nvme are x4 and the cards x8 each. The two drives are going full speed under Windows 10 and no problems are detected while rendering with the two cards (using one disk as source and the other as destination for instance). Maybe the bandwidth is probably somewhat lowered, but nothing that with the applications I run I can notice.

EDIT: Do you think it would be best using another SATA as system and using these two nvme drives as "data drives" from where I run my softwares?

The drivers I am using are the official Samsung NVME, I do not know why it gives me that message.

That's good to know, but in a way it makes the situation more confusing. I mainly brought it up because my Googling didn't turn up any official links, and one of the top results was a Reddit thread that had a link to drivers uploaded to Mega...

Yes, it is strange indeed. I will try with the process above.

I am also debating on which hard drive between the Intel 750 and Samsung 950 Pro would be better to install the system on and which one to run applications from. Their speed is almost the same in real world tasks, but the Samsung is slightly faster.

Thanks for the replies all.
The one in the image attached is the error I was receiving before. Now I have been able to follow the instructions and to enter the installation process. The second image I attached is where I am currently.

I cleaned the 950 Pro with diskpart and created a new partition. The system automatically creates two of them: the first one is 100 MB reserved for system, and the second one 476 GB. My question is: what I should do now taking into account that this is a nvme drive? Does it change something from the ahci type?

In another forum I read something along the lines of:" leave about 20% unpartitioned space for over provisioning, or garbage collection". What does this mean exactly? And, above all, is this really necessary and what are the advantages of doing so? These drives are pretty expensive and "wasting" 20% of the space leaves me a bit worried.

Thanks again for the help,
Carlo

The 100MB Reserved partition is normal for Win7. You can avoid it if you want (with a bit of effort), but I'm not aware of any good reason to do so.

Regarding over-provisioning, I thought we were past that with TRIM and other wear leveling technologies. But in fact, Samsung Magician has an option to configure over-provisioning, and for my drive (850 EVO 120GB) recommends 10%. I don't know what to tell you here.