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PC Graphics

crentsch80
Journeyman III

MacBook Pro 16'' with Sonnet 650 and WX 9100 crashes when using two monitors

Hi all

I am new to the eGPU topic and bought the Sonnet eGFX Breakaway Box 650 and an AMD Radeon Pro WX 9100 as it was recommended by Apple. Now I have a two computer setting and use a Lindy 6x2 HDMI Matrix Switch to be able to easy switch between the Mac and the Windows PC.

Now my actual problem: I want to connect from the Radeon mini DP to the HDMI Matrix Switch to make any additional HDMI adapters on the Mac redundant. In the moment I connect the Radeon to the Switch the MacBook starts to heat up and crashes in 5 - 10 seconds.

When I directly connect the Mac to the Switch nothing happens. When I direct link the Radeon to the displays nothing happens. I already changed the mini DP to HDMI cables and adapters, nothing changed.

Here is the setup:

  • MacBook Pro 16" (Model 2019) with 8-Core Intel i) and 32 GB DDR4 RAM; Big Sur 11.3
  • Sonnet eGFX Breakaway Box 650 connected via USB-C to MacBook
  • AMD Radeon WX 9100 with 16 GB detected right by the MacBook
  • Lindy 6x2 4k HDMI 2.0 Matrix (38148)

I cannot see any driver versions right now for the Sonnet Box, the AMD Radeon nor the Lindy Switch. Does anyone have had or has similar issues? Does I may miss some setup to made?

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