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  1. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Ok I'm so stupid ! I've not reached yet the end of the guide who say "SSDT-DTPG.aml is mandatory for all SSDT implementations"....! OK so now since I've copied this file everything is fine...Just a cosmetic issue when I changed the name into the ssdt files...
  2. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    I still don't understand what I'm missing to don't have the HDAU in PCI informations. If anybody can compare the SSDT-1 I've made with the original IOReg I've saved and tell me what it's still missing please ? Do I have to change the device ID's into the SSDT ? Thanks guys. (And have fun for...
  3. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    You are right it might be Slot-1 & Slot-3 for GPU's. I don't know what's wrong with HDAU, what value I must change in your SSDT-nvidia.aml ?
  4. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    It seems to be good for GPU's. If anyone can check I'm not doing any mistake. :)
  5. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Thanks for your quick answer. I've took a look and it seems to be too much difficult for me. I've already so many questions... So I'm wondering the exact purpose for SSDT implementation ? What will happen if I don't do this step ?
  6. sebtech

    Dual GTX 1080 and High Sierra issue

    I found the solution for me. It was into the bios. I have to disable the settings called "4G Decoding" for boot process. Hope it will works for you.
  7. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Hi ! Now my build is working like a charm, I want start the step of PCI implementation. I'm a bit confused because I've never do things like that. Can anybody give me some advises to edit the .aml files ? I know I have to use maciASL but I don't know where to start. First I would like to make...
  8. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Yes I did ! But enabling 4G decoding makes my system unable to boot, so I have to disable it. What will be the consequences sir ? :confused:
  9. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Hi guys ! I found it ! I found the black sheep ! It came from the setting "Above 4G Decoding". When enabled, macOS won't boot correctly with 2 Nvidia GPUs. When I turned it off, it boots quickly and my 2 cards are seen by the system with webdrivers. Do you have any explication ? I did some...
  10. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Man, I got a perfect install with sierra dual GPU and HT on for 2 years and never got an issue. That's not a choice, all my professional softwares needs CUDA to work. So there isn't any hope ? I had to revert back to 10.12 ?
  11. sebtech

    Dual GTX 1080 and High Sierra issue

    Hi ! I really need help to understand what is going wrong with my setup. During 2 years I was on macOS Sierra and everything was fine, I use this workstation to work everyday, but I had to update to High Sierra due a software update. Of course I did a fresh install for macOS High Sierra (based...
  12. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Turning off Hyperthreading didn't do the tricks for me...
  13. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Ye indeed, I made more tests today and it boot well with web drivers when only one GTX 1080 is plugged. When I try to add the second one, the boot takes so long or it's crashes.
  14. sebtech

    NVIDIA Releases Alternate Graphics Drivers for macOS Sierra 10.12.6 (378.05.05.25)

    Hi, I've just successfully made a fresh install of macOS High Sierra but I got some troubles to get my GPU work correctly. As long as I've not installed web drivers, everything seems to be fine. But After installing Nvidia web drivers and enable it into clover, my system start to act strangly...
  15. sebtech

    NVIDIA Releases Alternate Graphics Drivers for macOS High Sierra 10.13.0 (378.10.10.10.15)

    Hi, I've just successfully made a fresh install of macOS High Sierra but I got some troubles to get my GPU work correctly. As long as I've not installed web drivers, everything seems to be fine. But After installing Nvidia web drivers and enable it into clover, my system start to act strangly...
  16. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    The strangest thing is, when it finally came to startup after a few minutes, my cards are not showing up from the Slot 1 & 2. And from the about this mac pop up, there is blank space instead of GPU informations ! o_O And for informations, I don't think there is any link but I installed macOS on...
  17. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Got (quickly) a black screen. I tried to access through vnc meanwhile, I got the login information pop up, but no success to establish good connection.
  18. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Thanks for your help, but same results. Boot time is around 10 min with web drivers enabled.
  19. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Here you can find my EFI Folder EDIT : In reality I was not patient, it's working. I was not waiting too much time, but system can boot....after 15 minutes, desktop appears ! There is definitely something wrong here.
  20. sebtech

    How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

    Ok good to know about the obsolete flag. I don't know how but, I was able to boot with web drivers when I tested to add the EmuVariableUefi-64.efi and remove one card. I tested to remove the EmuVariableUefi-64.efi, that was still ok to boot with web drivers. Then, I put the second card, and all...
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