Hello @Gusarapinho
The board does indeed have ReBAR support built in, however the CPU isn’t on the list.
3000 series and above only.
You should be able to force it using the mod.
As for flashing the modified file, you might find info here Flashing Gigabyte while avoiding "Invalid BIOS image"
If you get stuck, send me a PM
best regards,
-68k