Make sure that your PCIe slot is enabled and set to the correct speed (e.g., PCIe 3.0 or 4.0). Also, check if there are any options related to graphics initialization or boot settings that could be causing the issue. If your GPU was working fine before, it's possible that the drivers may have become corrupted during the hardware switch. Try uninstalling your current GPU drivers and reinstalling the latest ones from the AMD website.