Hello. I just try to get work my first eGPU, and unfortunetlly i have a little issue. I use Sonet Echo III - D TB2 and Saphire Radeon RX480 Nitro 4g. I just install fresh system (sierra), have plug-in everything, but my system doesn't see the graphic card. In "This mac" ---> system report ---> PCI there is an information "An error occurred retrieving information about the PCI device."
Finally I was found automation script, and my macos found rx480 BUT, computer start working terrible SLOW. I don't know what's going on ... when i plug-out my eGPU computer still working as like he have 20 years old. I have iMac 5k (late 2014).
Please, any help ?