I just installed a GTX 1660 Ti into my computer that has been computing GPU tasks with a Ryzen 2200G. The 2200G is still in the socket. I plugged the 1660 Ti into the 2nd PCIe 3.0x16 slot so that the Vega 8 graphics could be used. HWinfo recognizes both GPUs, Windows 10 task manager only shows the Nvidia GPU. When I load BOINC, it says it can't find the AMD GPU:

9/21/2019 8:23:44 PM |  | CUDA: NVIDIA GPU 0: GeForce GTX 1660 Ti (driver version 436.30, CUDA version 10.1, compute capability 7.5, 4096MB, 3556MB available, 5714 GFLOPS peak)
9/21/2019 8:23:44 PM |  | OpenCL: NVIDIA GPU 0: GeForce GTX 1660 Ti (driver version 436.30, device version OpenCL 1.2 CUDA, 6144MB, 3556MB available, 5714 GFLOPS peak)
9/21/2019 8:23:44 PM |  | app version refers to missing GPU type ATI

I feel like I should be able to crunch with both the APU and the GPU. My cc_config file says:

<cc_config>
	<options>
		<use_all_gpus>1</use_all_gpus>
	</options>
</cc_config>

I feel like I've done everything I can. I also did a clean install of the Radeon 19.9.2, but that even says it can't find a graphics driver. Thoughts?

Sometimes NV and AMD drivers will need to be installed in a certain order. I thought it was NV that was more lenient and was to be installed 2nd but not so in your case. Maybe try DDU the drivers, NV and then AMD driver installs.

Sometimes NV and AMD drivers will need to be installed in a certain order. I thought it was NV that was more lenient and was to be installed 2nd but not so in your case. Maybe try DDU the drivers, NV and then AMD driver installs.

I ended up running DDU in the way you described. It didn't work quite right, but it was still necessary to do. It ends up, the AMD GPU was listed as an error code 43 under Windows. Long story short (in part, I don't recall my exact methodology), I put the 1660 Ti into the first x16 PCIe slot (PCIe2 for my motherboard), ran DDU, installed the Nvidia and then the AMD drivers. I was still getting the error code 43, but once I switched the HDMI cable from the 1660 Ti to the motherboard output, everything worked. I'm getting 8 GT/S for both GPUs (expected, I think), Boinc recognizes and runs on both GPUs, and when I run Timespy the graphics look like its running on the 1660 Ti and not the Vega 8.

I feel like something isn't quite right here, more with Windows than anything else, but I think I have it arranged in a way to make it work for what I need.