Thanks for the information "Fernando". I will post back my results, and experience.

Keep up the great site!

As an update I had e-mailed AsRock and they sent me a beta bios with NVMe support and it works dandy now. For anyone else with IMB181L that would like this UEFI

Hi,

I'd like to mod an AsRock Z68 Extreme4 board, for using with a Samsung 950 Pro.
I know that i don't have a M.2 connector, so i'm planning to use this adapter: Aqua Computer kryoM.2 PCIe 3.0 x4 (it even comes with a heatsink :) ). I even know that my motherboard doesn't have PCI-e 3.0 but only 2.0, so i'm going to use the PCI-E port 5 that is a x4 dedicated, or the PCI-E port 4 that it's a x16 shared with the vga (x8 and x8 if both are connected). The 950 performance will suffer a bit, but they'll be still bettern than my crucial m4 128.

Before I will try to flash my Bios, do i need to modify my bios? I've read that the 950 Pro can use a legacy mode for operate with old board.
Has anyone tryed to use the 950 Pro with a Z68?
Has anyone tryed to mod this motherboard for the NVMe support?
Will it boot from it?

Thx,

Stefano.

Not sure if this is off topic.

I have an Asrock Z77 Extreme6 and the latest beta bios works fine as is with the Samsung 950 Pro.
Latest bios is currently P2.80E found here. http://www.asrock.com/mb/Intel/Z77%20Extreme6/?cat=Beta
There is little information on this board and NVMe booting with the beta bios, the only search results i found were failures.

I am also waiting on some parts to get a Gigabyte X79-UP4 running, ill advise if i can get it to work with NVMe booting a 128GB SM951. I expect it will work just fine with the module inserted.

*UPDATE*
The Asrock Z77 Extreme6 worked fine with the 950 Pro in pure UEFI mode BUT wouldn't detect the SM951, the bios doesn't have enough space to insert the NVMe mod BUT if you update the bios with UBU first there is enough space to insert the NVMe mod.

Thanks Fernando for a very helpful guide and for the Forum in general. You say "Some NVMe SSDs like Samsung's 950 Pro SSD are natively bootable in LEGACY mode (CSM and loading of Option ROMs has to be enabled within the BIOS), because their Controller chip contains its own NVMe supporting Option ROM module." I have a Gigabyte GA-X79-UD5 motherboard and at first could not verify this. No matter what I did in the BIOS settings the Samsung 950 PRO SSD drive in my system would not appear. Until I changed the Intel SATA settings; if it is anything but RAID the Samsung appears as "N1 - Samsung SSD PRO 512GB". But if I change Intel SATA to RAID, the Samsung does not appear. I have two RAID volumes mounted on my Intel SATA ports in this machine, so the option of turning off RAID does not exist for me. I modded my BIOS following your directions, and now the Samsung appears as a PATA drive. I have not been able to boot from it after simply imaging my boot drive to the Samsung using Casper, but that is probably because I still have the old system disk in the computer.
I was wondering if you had any thoughts about the Samsung in Legacy mode not appearing when Intel RAID is enabled?

Hi, do you think it is possible to get NVMe boot support in AsRock C226 WS+? I will try to contact Asrock, but just in case this would not be successful...

Followed the steps with my MSI Z87-GAMING with SM951(nvme, duh). Works like a charm!!

I wrote to Gigabyte eSupport but I'm not holding my breath waiting for an answer. Adding the NVMe module as per your guide allowed me to install the OS on the Samsung PRO 950 and boot from it, while keeping the Intel SATA controller in RAID mode.

.

Gigabyte X79-UP4 booting from NVMe fine with the added modules