I flashed my ASUS p104-100 4GB with NVIDIA P104-100 8GB bios from techpowerup. There was a minor device subsystem id mismatch which I overwrote with -6 on the command line, rebooted the machine, and the card is fully unlocked to 8GB with absolutely no issues. Overclocked ram to 750 and getting 40MH/S on ETH.
https://i.imgur.com/GzBgNSa.png