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[SUCCESS] Gigabyte Designare Z390 (Thunderbolt 3) + i7-9700K + AMD RX 580

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I have the same issue
Well, good luck...
It could come from your Broadcom module, antennas, storage drive, RAM, PSU, GPU; also from your PC case and even from your neighbor's micro-wave :sick:

I tried every combination possible (except GPU and PSU) and never found the issue
Next thing ill try is get out the motherboard from the case and try without the case
in my experience the largest contributor to interference with BT is USB3. I have a NUC hackintosh that I use a BT dongle with, and I have had to use a USB extension cable to locate the BT dongle a couple of feet from the NUC. obviously with the Fenvi card providing BT this isn't an option, but if using a BT dongle it's worth a try.
 
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Last edited:
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@CaseySJ, I'm thinking that it would be a good idea to include minimal OS qualifiers for these guides. I was surprised that everything VT-d related works in Mojave but not in Big Sur. Unflashed TB, too.
 
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CaseySJ

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@CaseySJ, I'm thinking that it would be a good idea to include minimal OS qualifiers for these guides. I was surprised that everything VT-d related works in Mojave, and on an unflashed Z390 Designare, but not in Big Sur except for the RAM.
Does this mean you were able to run Big Sur on your Designare Z390 with AppleVTD present in IOReg, and WiFi/Ethernet failed to connect with 64GB RAM installed?
 

CaseySJ

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CaseySJ

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no luck, i added the file to acpi and make sure it was checked in config

here is a photo of my bios setting for intel gpx
Please post a screenshot of the ACPI section of config.plist (using OpenCore Configurator).
 

CaseySJ

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no luck, i added the file to acpi and make sure it was checked in config

here is a photo of my bios setting for intel gpx

Please post a screenshot of the ACPI section of config.plist (using OpenCore Configurator).
Attached is a modified SSDT. Simply disable the previous one and try the new one.

P.S. Please use the "Reply" button at the bottom right of the post so I can trace the conversation back to earlier posts.

Screen Shot 2021-06-29 at 5.36.39 PM.png
 

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  • SSDT-Designare-Z390-Disable-NVDA-Slot-1-GPU.aml
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@CaseySJ On my x299 board it loads but I loose ethernet. So I guess x299 boards are susceptible
 

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  • Screen Shot 2021-06-29 at 6.57.32 PM.png
    Screen Shot 2021-06-29 at 6.57.32 PM.png
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Last edited:
Joined
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Messages
1,018
Motherboard
Gigabyte Z390 Designare
CPU
i9-9900KS
Graphics
RX 580
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  1. iMac
  2. MacBook
  3. MacBook Pro
  4. Mac mini
  5. Mac Pro
Classic Mac
  1. Classic
  2. iBook
  3. Power Mac
  4. PowerBook
  5. Quadra
  6. SE/30
Mobile Phone
  1. iOS
Does this mean you were able to run Big Sur on your Designare Z390 with AppleVTD present in IOReg, and WiFi/Ethernet failed to connect with 64GB RAM installed?
Yes. In Big Sur with Apple VTD present from i/o Reg Explorer, 4x16GB of RAM are present, but there is no ethernet nor wifi services, even if the network configurations are removed or reset: Network interfaces are not even manually configurable with VTD enabled. Still using the modified Z390 BIOS: Z390DESI_modMC_01052021_0906_Rev_0xEA.F9i 2 and unflashed Thunderbolt.
With VTD disabled, everything in Big Sur with UAD and Pro Tools and Thunderbolt works as well as Mojave, but I would still use Mojave for recording. I edited that original post that had a terribly awkward and confusing last sentence.
 
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