frou's post on getting Windows 10 to boot on a SM951 SSD blade on a Mac Pro 5,1 really works!
And without Boot Camp, yet!
Well done, if I may say so...
I would underline the need frou has indicated, however, before the Windows 10 install attempt, to remove all other hard drives (SSD or otherwise) so that the Windows Installer sees only the SM951 during the early part of its install process.
As to frou's reason (borne out in my own experience), if any other hard drives are present during the Windows install launch, the Windows Installer cannot get past its step where it must make the SM951 reboot when it needs to to get through the entire install process.
If any other hard drives are present at that point in its install process, I've found that the Windows Installer always fails with a message to that effect.
If the SM951 is the only drive present, the install process finally concludes successfully.
During the setup process, however, I found that there were other things that needed my attention...
For starters, although my Mac Pro 5,1 is setup for WiFi 802.11ac, the Windows Installer can't seem to get the Broadcom 802.11ac Network Driver installed, so I had to make sure I had an Ethernet connection to my Mac Pro to enable any networking to be available so the entire setup part of the install could work.
There are other Windows 10 install fine tuning issues to deal with for the SM951, in my experience, but I do know that Windows 10 Pro can be installed to boot just fine in our Mac Pro towers 3,1 4,1 5,1 2009 through 2012.
And this is fantastic!
Cheers,
tyvol
PS. This good news is true, however, only if the SM951 blade is without the NVMe capability, as any Mac Pro 3,1 4,1 or 5,1 MOBOs wern't built to handle booting from any NVMe blade.