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

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Joined
Mar 2, 2011
Messages
140
Motherboard
Gigabyte Designare Z390
CPU
i9-9900K
Graphics
2x RX 580
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@bigboosh,

Hopefully it's the motherboard. A similar thing happened very recently to a family member. We replaced PSU and CPU before deciding to replace motherboard. It was the motherboard. Let us know how it goes.

Just swapped the motherboard and tested. Same issue unfortunately.

At this point it’s so hard to if it’s hardware or software at fault. I guess I could try swapping the CPU but that seems so unlikely.

As far as BiOS settings go, the only tweaks I’ve done outside of the guide are fan settings - which I’m assuming doesn’t matter. Thermals all seem fine.

I suppose I could take it out of the case and see if that’s something.

Or, like others have suggested, roll back to Mojave and get rid of the 5700xt and see what happens, but the fact that the rx 580 does the same thing in Catalina makes me hesistant to try rolling back.
 

CaseySJ

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Joined
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15,846
Motherboard
Gigabyte Z490 Vision D
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Just to chime in here, if you do have the frame buffer installed, when I upgraded to Catalina I could not get the HDMI to work at 60hz after the login screen unless I put the machine to sleep and woke it up again, even though the monitor supports 60hz. Switching the monitor to 50hz in OSX system prefs fixed it (I used a second monitor attached to the thunderbolt port to do this).
For 4K monitors, the on-board HDMI port only goes up to 30Hz (HDMI 1.4). For non-4K monitors, higher refresh rates are supported.
 

CaseySJ

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Joined
Nov 11, 2018
Messages
15,846
Motherboard
Gigabyte Z490 Vision D
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i5-10400
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RX 580
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  1. Quadra
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Just swapped the motherboard and tested. Same issue unfortunately.

At this point it’s so hard to if it’s hardware or software at fault. I guess I could try swapping the CPU but that seems so unlikely.

As far as BiOS settings go, the only tweaks I’ve done outside of the guide are fan settings - which I’m assuming doesn’t matter. Thermals all seem fine.

I suppose I could take it out of the case and see if that’s something.

Or, like others have suggested, roll back to Mojave and get rid of the 5700xt and see what happens, but the fact that the rx 580 does the same thing in Catalina makes me hesistant to try rolling back.
Oh that's unfortunate. What was it that Sherlock Holmes would say..."When you have eliminated the impossible, whatever remains, however improbable, must be the truth."

If the CPU is the only thing left unchanged, then...

But before jumping to that (which is a very expensive proposition), please try this:
  • Remove the internal macOS SSD.
  • Remove the AMD GPU.
  • Disconnect all USB devices except keyboard and mouse.
    • Which keyboard and mouse are you using? At this point I can't even dismiss the keyboard and mouse!
  • Disconnect all Thunderbolt devices.
  • Disconnect all Windows drives.
  • Connect a spare SATA SSD.
  • Follow the Catalina 10.15.4 guide (including unlocking NVRAM) very carefully. One little deviation could spell doom.
    • Follow the sections for Internal GPU (iGPU). Ensure iGPU is enabled and Initial Display Output is set to IGFX.
    • Connect monitor to rear Thunderbolt port (if you have USB-C to DisplayPort cable) or HDMI port.
    • After Catalina 10.15.4 is installed, check for stability.
 
Joined
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Gigabyte Designare Z390 - F6
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For 4K monitors, the on-board HDMI port only goes up to 30Hz (HDMI 1.4). For non-4K monitors, higher refresh rates are supported.

The HDMI monitor is only 1920x1080. Works at 60hz, but not initially after login. Initially it'll only work at 50hz. It's a cheap AOC gaming monitor.
 
Joined
Nov 3, 2017
Messages
338
Motherboard
Gigabyte Z490 Designare
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i9-10850K
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Radeon VII
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@CaseySJ I had lost bluetooth prior to upgrading to the latest Catalina, and decided to try regain BT.
So I took out everything from the system except a clean formatted M2 drive, my Radeon VII and the Fenvi card.
I then installed Mohave carefully and after I had it configured and had BT working again, then upgraded to the latest Catalina and it is working again.

Not sure what changed as I have followed the the forum with the Designare carefully. Glad to have the system upgraded and working now.


screenshot_02.png
 
Joined
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Messages
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Gigabyte Z390 Designare
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i9-9900K
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RX 580
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@CaseySJ Say I also am water-cooling my Z390 Designare with only 1 240mm radiator .... but amazingly enough with my EVA water block and 16mm OD PETG my temperatures for 24 hours are no more than 35degrees C ... also I tried this last weekend to upgrade to Catalina from Mohave 10.14.6 and failed miserably and had to flash my bios to F8 and reload from my sabrent backup .... should I send you my current picture of library/extensions and my config.plist ?
 

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Joined
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Good idea -- I'll create a new section entitled Extended List of Compatible Devices with Thunderbolt Bus. It will include devices that began to work after new firmware was flashed.

Did the OWC 10G Ethernet Adapter work without Thunderbolt Bus? I believe the CalDigit TS3 Plus dock has worked before.

eGPUs, Thunderbolt Ethernet Bridge, Target Disk Mode, and perhaps some LaCie storage arrays(?) will be among the entries in the new section.
Yes the OCW 10G Ethernet did work prior to Thunderbolt bus.
 
Joined
Mar 21, 2011
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GA-Z390-Designare
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i7-9700K
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RX 590
Hey Casey thanks for the reply but I have Google wifi and I don't think you can do that with it. Ill figure it out

thanks

Matt
Are you using a WiFi/Bluetooth PCI-e card, or are you using a Bluetooth USB dongle?
 
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