Enable both HD530 and NV GPU with NV GPU as first in UEFI?

[ffffwh]

I would like to drive both GPU as a workaround of NV web driver bug. (https://www.tonymacx86.com/threads/nvidia-web-driver-ibooks-bug.203229/page-8#post-1403934)

0. The monitor is always connected to NV GPU.
1. If I set iGPU as first GPU, it works with no problem.
2. If I set PCIe 1 as first GPU, iBooks (Instruments, etc) will display lots of noise.

Using iGPU as first GPU means I will miss boot screen and clover screen. Is there any way to use NV GPU as the first?

 

[ffloyd]

Thank you for "first GPU hack" - it saved my day)) I've tried a lot of configurations to make GPU work as first one without noticeable results.

I'm just curious - what will you miss if you connect your monitor to iGPU port? (maybe I miss some features and don't even know about it).

 

[Fl0r!an]

Graphics acceleration will be done by your iGPU then, so you miss all the performance of your dGPU.

 

[ffloyd]

Graphics acceleration will be done by your iGPU then, so you miss all the performance of your dGPU.

Yes, I know it. But all my GPU-related activities in Windows scope (Witcher 3, as example =) ).

Are there any issues connected with CUDA/OpenCL?

 

[Fl0r!an]

Some applications don't let the user decide which GPU to use for compute tasks, and they may default to the one attached to your display, so the dGPU stays unused. I think FCPX is one of them.