How to speed up RADEON VII on Mac - Razer Core X & Catalina  

Hi eGPU people!

Thanks for all the great info on this forum!  Only way I could get an Octane render setup on my Mac - appreciate it.

--- My original setup was 2018  iMac  with High Sierra,  GTX 1070  with the  Razer Core X .  This setup worked great (with small stability issues but could live with it).

But after OTOY brought out Octane X with support for Metal this year - I recently purchased a  Radeon vii  as it had a pretty high Octane Benchmark score of 206 (for AMD cards).  I was hoping to get a good punch of extra gpu power from the  Radeon vii  and not have a hackintosh setup to run the Nvidia card on my mac.

It started off great with the vii running fine straight off the bat.  Even after running the purge wrangler, the results came back that I did not have to update drivers etc.  BUT after using the vii in Cinema4D and rendering with Octane - I was getting the same results / render times as the  GTX 1070 .  Maybe even a little worse.

So my question is!!! - The vii is supposed to be 50-60% faster than the  GTX1070 .   Can anyone help with what might be the issue?  

Would love to try overclocking it but can't find software to do this on mac.  I might have to jump back to Nvidia - side question - What would be the fastest Nvidia card I could use with MacOS?

Thanks in advance!