download nvflash:

wget https://us6-dl.techpowerup.com/files/IN0IyLMMtrrjBPCKtytXUg/1676903060/nvflash_5.728_linux.zip
unzip nvflash_5.728_linux.zip

set nvflash permissions:

chmod +x nvflash

save bios to file:

./nvflash -b 3070FE-bios-$(date +%F).rom

download bios version:

wget https://www.techpowerup.com/vgabios/231632/NVIDIA.RTX3070.8192.210309.rom

flash bios:

./nvflash NVIDIA.RTX3070.8192.210309.rom

references

[latest nvflash]

[vgabios collection]

Howto nvflash