Sorry mate,
Yeah I was tired when wrote bad.
First , I turn your MP5,1, login , insert your DVD copy of WIN10, turn off your Mac, remove the Mac Hard Drive where MacOS is installed.
2nd, turn on your Mac & hold down ALT / Option key until you hear the booting tone, release it, and wait for the Mac to boot up from the DVD & and install Window 10- make sure you have another Hard Drive: small old school Hard drive is good, I used a 120 GB, install windows 10 on it and after the whole process is done, two things, download boot camp for Windows and install it, also the drivers for the the GB-Titan Ridge PCIe.
After this, restart on windows again, the GB-Titan will be recognized by Windows 10, but for some reason the Thunderbolt ports won’t work, so, turn off the Mac and swap it for the Alpine PCIe rev2, “connect the Thunderbolt adapter 3 to Thunderbolt 2in the port, “very important to have it connected before turn it on”,turn it back on Win10, and now your Apple Thunderbolt Display will work and you will see WiN10 on your screen. Not over yet. Turn off your Mac, connect back your Mac Hard Drive, I use a PCIe adapter for my SSD, and turn ON your MP5,1.
After is on, download and instal Boot Champ, restart and follow this
Boot into recovery (Hold Command + R after turning the mac on)
2. From menu bar find Terminal
3. Type in terminal: csrutil disable
4. Now your MP5,1 will start on Mac,
Launch Boot Champ, and you will see the option to restart on Windows,
The MP5,1 will restart into WIN, now by you doing all this, the drivers are install, the PCIe card is active and your ATDisplay is getting connection, now Very important, the same you did to boot up into Windows using Boot Champ, you will do the same in Windows using Boot Camp and sleet the option to restart into MacOS, once you have done that, your Mac will restart into MacOS and your Thunderbolt works!
please DO not turn off your MacPro5,1 otherwise your drivers for the Alpine PCIe will disappear and your MacOs won’t recognize it. And you will have to redo the process of bootchamp and bootcamp.
I put my MP5,1 into sleep.
I hope this makes sense to you and every else.
cheers!