Use laptop NVIDIA GPU with High Sierra?

I have a laptop that has a NVIDIA optimus compatible MX150 DGPU. Right now, I'm using Mojave with the IGPU. Would it be possible to add another APFS volume, with High Sierra, that uses the DGPU? I understand dynamically switching between the two is impossible. If I were to do this, how can I disable the IGPU?

submitted by /u/superl2
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