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

CaseySJ

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View attachment 523219
I don't have DMac or AppleVTd in my IoRegistry. I am running with iMac20,1.
Ah, but AppleVTD is the very reason for this experiment. It allows Thunderbolt to function more fully, but ends up crippling both WiFi and Ethernet when more than 16GB memory is installed.

We're trying to see if we can use more than 16GB memory with AppleVTD enabled without affecting our WiFi and Ethernet ports.
 
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Ah, but AppleVTD is the very reason for this experiment. It allows Thunderbolt to function more fully, but ends up crippling both WiFi and Ethernet when more than 16GB memory is installed.

We're trying to see if we can use more than 16GB memory with AppleVTD enabled without affecting our WiFi and Ethernet ports.
Sorry, how do I go about enabling it?
 

CaseySJ

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Sorry, how do I go about enabling it?
Please see first 4 bullets in Experiment Update #3.

My next step is to check the memory used by @jiffyslot, namely: Corsair CMK64GX4M4A2666C16 Vengeance LPX 64GB (4x16GB) 2666MHz. Will place an order in the next couple of days. He showed proof of WiFi/Ethernet functionality with AppleVTD enabled, but with macOS Mojave. Need to check whether this works in Catalina and Big Sur.
 
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Please see first 4 bullets in Experiment Update #3.

My next step is to check the memory used by @jiffyslot, namely: Corsair CMK64GX4M4A2666C16 Vengeance LPX 64GB (4x16GB) 2666MHz. Will place an order in the next couple of days. He showed proof of WiFi/Ethernet functionality with AppleVTD enabled, but with macOS Mojave. Need to check whether this works in Catalina and Big Sur.
So my wifi is also disabled with AppleVTd loaded and all 4 Corsair Vengeance RGB Pro Dimms installed. Sorry.

I haven't tried removing any DIMMs to see if Wifi loads. Curiously, my iPhone's USB hotspot is working just fine (that's how I'm posting this message). Bluetooth continues to work as well.
 
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Update on Antelope Audio Remote Control Panel Connectivity:

- Antelope TB3 Drivers different versions on each system: Control Panel disconnects/times out in 2 minutes or less. iOS application 100% connected and working.

- Antelope TB3 Drivers are the same on each system: Control Panels stay connected and function 100%. iOS application 100% connected and working.

I will need to test this out on another system that is not using a z170x board to make 100% sure that it is just a driver mismatch causing the dropouts.
 
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Please see first 4 bullets in Experiment Update #3.

My next step is to check the memory used by @jiffyslot, namely: Corsair CMK64GX4M4A2666C16 Vengeance LPX 64GB (4x16GB) 2666MHz. Will place an order in the next couple of days. He showed proof of WiFi/Ethernet functionality with AppleVTD enabled, but with macOS Mojave. Need to check whether this works in Catalina and Big Sur.
Ha ha, I really have no idea why this thing works in Mojave. I'm going to try to get this thing going for Big Sur so that I have some parity* with most people's current build.

@CaseySJ UPDATE: In Big Sur, both ethernet ports and WiFi are broken with VTD enabled in the BIOS, but all 64GB RAM is available.

*RAM dad-joke inserted here.
 
Last edited:

CaseySJ

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So my wifi is also disabled with AppleVTd loaded and all 4 Corsair Vengeance RGB Pro Dimms installed. Sorry.

I haven't tried removing any DIMMs to see if Wifi loads. Curiously, my iPhone's USB hotspot is working just fine (that's how I'm posting this message). Bluetooth continues to work as well.
With two of the four DIMMs installed (A1/B1 or A2/B2) everything will work fine with AppleVTD enabled. It's only when we exceed 16GB that things go awry. This problem does not affect X99 and X299 systems (nor Z170X Designare, it seems).
 

CaseySJ

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...
- Antelope TB3 Drivers are the same on each system: Control Panels stay connected and function 100%. iOS application 100% connected and working.
...
Now that's more like it...
 
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I have good news for you all. With this VTD mod, I was able to get pro tools carbon hardware working via the apple to ethernet adapter on my 390 board. Both tb ports worked and i used both the akiko tb 2 to 3 and star tech 2-3 adapter. I tired the original apple tb adapter but that never worked even in catalina.

My bottom Ethernet works but not my top. I didn't try wi fi as ill never use it. I also only have 2 8 gig sticks of ram so im at 16 gigs

Since i have the 10g card thats a pcie slot ...ill most likely be going back to that and using that for my avb setup. Plugging into that directly also works with this mod so i can use pt carbon via both tb ports and also my asus 10g nick card
But im happy to know this is working. TY

Also, if someone has a second, my amd 5700 gpx card is in my vision Dp board since i was working on that last week. I have a nvidia 1070 in pcie slot 1 on this 390 and is there a way to disable that only in mac so when i run this machine i can just use the intel built in gpx card. and the nvidia in windows? I tired to boot using the 390 hackindrom efi with intel but that hangs half way on boot and i think its cause of this nvida card. I can get into big sur but some of my plug ins in pro tools wont load cause no gpx support

thanks
 

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I'm not sure what the difference in RAM modules is, but I wonder if adjusting the timings in the BIOS effects the results.
 
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