@Rocket since your motherboard doesnt have a flashback feature, you could dump your bios here using your bios own feature if there is such a feature like gigabyte that allows to save bios into the drive or use intel FPT, try take a look at this tutorial (just do part 1 no 1 and 2 then zip the bios file and send it here).
@Koekieezz I inserted the NVMe drivers into the BIOS with this guide: HowTo-Get-full-NVMe-support-for-all-Systems-with-an-AMI-UEFI-BIOS
and then tried to flash it with EZ Flash. The message "Security verification failed" came up.
Attached is a rar-archive with the original BIOS and the modded BIOS and a photo of the error message.
The UEFI system environment REQUIRES UEFI compatible hardware, besides that the motherboard reports it as you can see in your capture screen.
So even with the bios settings configured, the boot process of the OS setup continues as intended, but in legacy mode.
Your external GPU card is not UEFI compatible.
If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter ASUS P8B75-M into the search box above and then submit. In the results, choose the best match for your PC and operating system.
After downloading your new driver, installation is the next step. On Windows, utilize the built-in Device Manager utility to manage this process. This tool provides a comprehensive view of all system-recognized devices and their associated drivers. To complete the installation, a system restart is typically required for the driver update to take effect.
c80f0f1006