That looks completely wrong, seems it's using the iGPU instead of Radeon VII.
Did you pick Radeon VII as the compute device in GB?
View attachment 405808
LuxMark score looks good, close to mine and others who have reported so far. It's probably just using all available GPUs including iGPU.
Upgraded from High Sierra to Mojave today, along with switching from 1080TI to Radeon VII. I simply updated SSDT's from kgp's 10.14.5 Beta EFI folder from his repository, updated kext's from kip's repository, and updated Clover to latest version. Manual uninstall of Nvidia web drivers and CUDA. I tested on a cloned volume first, then updated my working volume. All went very smoothly. No issues.
Performance info: Geekbench score went from ~40,000 to ~48,000 for some reason. Ran the test multiple times and it is consistent. OpenCL is ~170,000 and Metal is ~162,000... also consistent. Cinebench R20 score is 5353, right where I expected comparing to the list of systems in the benchmark app. Performance in Resolve is about the same and perhaps about 10% better with the Radeon VII compared to the 1080TI.