Cannot use GTX 970 with iGPU Intel HD 530

Hi at all! I'm trying to install macOS Catalina on my PC. I have already installed macOS successfully. I can boot normally.

The only thing is that I cannot manage to use my GTX 970 as passthrough and my HD530 as headless. Is this even possible? From what I read from OpenCore guide, it's possible to do so.

I see my graphics adapter being the GTX 970 in macOS (but without drivers, I see low resolution and 5 MB of VRAM), so this is an error. It should be the HD530, I think.

With Hackintool, I can see both my dGPU and iGPU being recognized correctly in macOS.

In BIOS I have enabled IGD Multi-Monitor, with 128MB of shared memory and PEG being the main adapter, since my PC has both Windows and macOS.

I dGPU is not usable as passthrough, should I disable completely all GPU except the HD530, and connect the HDMI cable from the motherboard to my monitor when using macOS? There are some alternatives?

Thanks in advance!