Many older Samsung OEM boards have "Secure Boot" or "Legacy" settings that prevent modern UEFI-only graphics cards (like the RTX series) from booting. A BIOS update often improves this compatibility.
A common issue with the Samsung B75S1 is the "Black Screen" when installing a new GPU. This is usually because the BIOS is set to mode, while new GPUs require UEFI . Samsung B75s1 Bios
This usually requires a CH341A external programmer or a DOS bootable USB if the manufacturer provided a standalone flasher. Many older Samsung OEM boards have "Secure Boot"
If you are using the board in a non-Samsung case or the automated tool fails, you may need to find a dumped .bin file from a BIOS repository. This is usually because the BIOS is set
Run the utility within Windows. It will ping Samsung’s servers, check your current version, and download the correct update automatically. 2. Manual Flashing (Advanced)
Once you are inside the BIOS, there are a few settings you should optimize:
Disable this if you are trying to boot from a non-standard Linux USB or installing an older OS. Enable it for Windows 11 compatibility. Troubleshooting "No Boot" After GPU Upgrade