BlackMagic egpu going extremely slow. Need help.
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BlackMagic egpu going extremely slow. Need help.  


New Member
Joined: 2 months ago

I use an open source 3D animation tool called Blender(specifically 2.79). The user can use an egpu to speed up render times and whenever I do, the egpu ends up going slower than the cpu. Initially I thought this was a Blender thing, but when I tried playing a video game with it, it started lagging immediately, and only stopped when I put it back on cpu. Am I using it wrong?

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.


Mini i5
Honorable Member
Joined: 1 year ago


Using it on which Mac and OS version? External display? 

Make sure you have a standard, undamaged, TB3 cable.

You can read through Apple’s external graphics guide for settings:

Try running the Basemark for Metal benchmark at 4K and post the result.


2018 Mac Mini [8th,6C,B] + RX Vega 56 @ 32Gbps-TB3 (Sonnet Breakaway 650) + macOS 11.1 & Win10 [build link]