It really is pretty simple. Set the engine to Metal,
GPU choice to manual, select Vega only. "use display
GPU to compute" will be greyed out. Your 580 will just serve the display output, and Vega will do the heavy lifting.
You did not waste the money buying the eGPU. Davinci will perform much better in the above configuration than with both GPUs, or with 580 alone.
That being said, there are some tasks where you will never see a full load on the
GPU. There are quite a few things in Davinci that are still reliant on CPU for the most part. Like, for instance, delivering in H.265, which is CPU-intensive process. Your activity monitor will show almost zero action on the
GPU window, while the CPU will be maxed out.
NeverMindThe wrote:Working in latest beta of Resolve Studio 16 and installed a Razer Core X eGPU with an RX VEGA 64 card on iMac 2017 5k running High Sierra 10.13.6.
Definite improvement particularly after grading etc and export speeds much better than stock internal card alone, BUT the Vega64 isn't running at max speed/capacity!
I tried exporting a sequence with both internal AND external
GPU's and while the internal card showing it was at max performance, the Vega64 was only running about 50%!
Tried running with the Vega64 ONLY and it ran full pelt 100% and actually matched the performance of the render run using both cards, on its own!
So, I can't help feeling a little annoyed that when running both cards, that the Vega64 isn't pulling its weight.
Any way of 'forcing' the Vega64 to be the dominant card and do most of the work?
Here's the
GPU history for that render run....
Screen Shot 2019-06-13 at 18.54.19.png