The Zotac and Asus bios files should work for your card. You could also try out the 400w Gigabyte bios file, that was posted in this thread.
https://www.techpowerup.com/vgabios/275794/275794 this one's the GameRock 320w limit bios. If you prefer to try out Palit's bios.
If your going to flash to another vendors bios. Use nvflash64 -6 biosname.rom, and then follow the prompts. Please ensure you save a backup of your stock rom before flashing any bios file. Looking at the images for your particular card. I don't think that you card has 2 bios options. So, be careful when trying out bios files.
In the unlikely event that you're unable to get any bios working. Once, you've restarted your rig and are seeing artifacts that you don't like. Use the same command I posted above, and you should be golden to revert back to your stock bios. Good luck.