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

Joined
Jun 6, 2020
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Gigabyte Z390 Designare
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i9-9900K
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RX 580
** AppleVTD Ethernet/WiFi PROBLEM SOLVED **

@Elias64Fr @Inqnuam @yosoyoco @NCMacGuy @CODYQX4 @gandem @qthegaijin,

If the motherboard has only two DIMMs (in slots A1/B1 or A2/B2) then Ethernet and WiFi are fully functional with VT-d enabled! I just removed two of the four DIMMs from my Primary Z390 Designare and now it's working fine.

View attachment 522731View attachment 522732
Congratulations ! I have four dimms, I hope we can find a solution to keep my 64GB
 

CaseySJ

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Asus Z690 ProArt Creator
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Can you explain why ?
I simply looked for differences between my two systems. Realizing that the working unit has 2 DIMMs and the non-working unit has 4 DIMMs, process of elimination demanded that I remove two of the four DIMMs from the non-working system. And voilà.

What about people that need to use four 16 GB DIMMS ?
I didn't say it was a perfect solution! :)

Now that we know what causes the problem, the next step is to see if there's a proper solution...
 

CaseySJ

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Asus Z690 ProArt Creator
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  1. Quadra
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Congratulations ! I have four dimms, I hope we can find a solution to keep my 64GB
Up to now the Antelope Interface had 0% connection success. Now it has 100% success, but the penalty is half the number of DIMMs. Tradeoffs. But let's see if a proper solution can be found.

For example, if we enumerate the 4 DIMMs in PlatformInfo --> Memory, will it help? Will try soon.
Screen Shot 2021-06-24 at 5.17.27 PM.png
 
Joined
Jun 6, 2020
Messages
58
Motherboard
Gigabyte Z390 Designare
CPU
i9-9900K
Graphics
RX 580
Up to now the Antelope Interface had 0% connection success. Now it has 100% success, but the penalty is half the number of DIMMs. Tradeoffs. But let's see if a proper solution can be found.

For example, if we enumerate the 4 DIMMs in PlatformInfo --> Memory, will it help? Will try soon.
View attachment 522738
You’re a genius !
 

NorthAmTransAm

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Jul 26, 2018
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Motherboard
Asus Z370-A Prime II
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  1. MacBook Pro
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@CaseySJ this was so much fun to watch. Currently I'm reading the guide to learn how the custom memory section of OC works.

For anyone else doing this, the OpenCore manual is super easy to read from their site as opposed to the PDF

 

CaseySJ

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Joined
Nov 11, 2018
Messages
17,894
Motherboard
Asus Z690 ProArt Creator
CPU
i7-12700K
Graphics
RX 6800 XT
Mac
  1. MacBook Air
  2. MacBook Pro
  3. Mac Pro
Classic Mac
  1. Quadra
Mobile Phone
  1. iOS
@CaseySJ this was so much fun to watch. Currently I'm reading the guide to learn how the custom memory section of OC works.

For anyone else doing this, the OpenCore manual is super easy to read from their site as opposed to the PDF

I have already configured that section for 4 DIMMs using a guide posted by @rj510 in the Gigabyte B550 Vision D Golden Build. But my 280mm liquid cooler’s pump is misbehaving, preventing the system from booting. Will install a replacement tomorrow.

I did, however, discover that even with 2 DIMMs installed, if we mis-configure the Memory section, then Ethernet and WiFi will stop working. So we may be on the right track. If we configure Memory properly, then just maybe four DIMMs might work…
 

NorthAmTransAm

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Joined
Jul 26, 2018
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1,262
Motherboard
Asus Z370-A Prime II
CPU
i9-9900K
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RX 580
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  1. MacBook Pro
Mobile Phone
  1. iOS
I have already configured that section for 4 DIMMs using a guide posted by @rj510 in the Gigabyte B550 Vision D Golden Build. But my 280mm liquid cooler’s pump is misbehaving, preventing the system from booting. Will install a replacement tomorrow.

I did, however, discover that even with 2 DIMMs installed, if we mis-configure the Memory section, then Ethernet and WiFi will stop working. So we may be on the right track. If we configure Memory properly, then just maybe four DIMMs might work…
Oof, sorry bud. God speed and good luck!
 
Joined
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316
Motherboard
Gigabyte Z390 Aorus Master
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i9-9900K
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HD 630HD + RX 6900 XT
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  1. MacBook Pro
  2. Mac mini
  3. Mac Pro
I have already configured that section for 4 DIMMs using a guide posted by @rj510 in the Gigabyte B550 Vision D Golden Build. But my 280mm liquid cooler’s pump is misbehaving, preventing the system from booting. Will install a replacement tomorrow.

I did, however, discover that even with 2 DIMMs installed, if we mis-configure the Memory section, then Ethernet and WiFi will stop working. So we may be on the right track. If we configure Memory properly, then just maybe four DIMMs might work…
Interesting. I tried pulling out 2 DIMMs on my board, and I'm still getting the same behavior with the networking bouncing on and off. The apple gigabit adapter remains rock solid though.
 
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