Elitedesk 705 G4 conflict between GPU (RTX 2080 Ti) and APU (Ryzen 2200g) no detect or get code 12

[Bootlegin]

I have an HP Elitedesk 705 G4 that I received second-hand and am having a critical issue with installing a GPU. It would appear that there is a conflict between my GPU (RTX 2080 Ti) and APU (Ryzen 2200g) causing the GPU to display code 12 from device manager in UEFI mode, and not detect at all in legacy mode. It's acting like there's an I/O conflict, but I have NO idea how to to fix this. I went into "system information->hardware resources->conflicts/sharing" and it does look like the memory addresses between the RTX 2080 and AMD Vega 8 and they are similar, but the last few digits are different which means the memory addresses should be allocating correctly. Maybe there is just straight up not enough resources going to the PCIe, causing only  APU to have enough memory and completely starving the GPU? If so I don't know how to fix this either. As far as I'm aware, the BIOS is only let me allocate up to 512MB of video memory, which I would assume is for the APU.

I really wish the HP BIOS wasn't so stripped of critical features like selecting the primary video controller. If there's a way I can modify any hidden BIOS settings outside of the post BIOS menu, that would be extremely helpful.

[Bootlegin]

Any help would be appreciated