Put here ROM file.
I tried this bios (re-modded by me, better said, bios was first modded with RBE by a friend of mine, I just adjusted fan speed and mem freq) ONLY on Sapphire 5700XT turbine cooling (reference board) and works.
Bios is from 50th anniversary (XTX).
Tried on sapphire Nitro+ and doesn-t work, as I said.
I think will work only on reference board with turbine cooling.
Does your modded bios have other timing tweaks other than straps 1500 ?