This is time consuming for users, follow the guides and try out yourselves.
[Guide] - How to Bifurcate a PCI-E slot - BIOS/UEFI Modding / BIOS Modding Guides and Problems - Win-Raid Forum (level1techs.com)
[Guide] PCIe Bifurcation - mapping IIO/IOU to PCIe slot - BIOS/UEFI Modding / BIOS Modding Guides and Problems - Win-Raid Forum (level1techs.com)
EDIT: Brand has nothing to do with it.