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Instructions for flashing the VBIOS of a NVIDIA video card: You'll need: A VBIOS file you want to flash The latest version of NVflash, a DOS utility to flash the VBIOS of Nvidia cards. A USB drive, formatted to boot DOS, in order to use NVflash How to create a bootable USB flash drive: The flashing procedure: Put the NVflash files to the root of your prepared (DOS bootable) USB drive. Do the same with the Vbios you want to flash. NOTE: DOS has a limit of 8 characters per file name (not counting the extension). So make sure to rename your files appropriately before putting them on the USB drive. Make sure the USB drive is plugged into a port which is active at boot, reboot the system and go to the boot manager. Choose to boot from your prepared USB drive. As soon as you see the command line you're ready to go, write dir and hit enter to display all the files on the USB drive. Display all Nvidia adapters in the system: nvflash -a or alternatively the longer version of the command: nvflash --list This command will return you a list with all Nvidia adapters present in your system. Here's an example output of this command run on my M15x with a 680m in it: NVIDIA Firmware Update Utility (Version 5.117) NVIDIA display adapters present in system: <0> N13E-GTX (10DE,11A0,1028,02A2) H:--:NRM B:02,PCI,D:00,F:00 The number in the <> brackets is the index of the corresponding device. SLI users will have more than one entry and flash each card separately. Backup your current VBIOS: Never forget to keep a backup of your original VBIOS before you flash anything non-stock. Use this command to save a copy of the firmware to your USB drive: nvflash -b filename.rom or with nvflash --save filename.rom Flash the VBIOS to your card(s): For a single card it's really straight forward, you don't need to worry about the adapter indices. Just use this command: nvflash -6 vbiosname.rom -6 will allow you to override mismatches of the PCI subsystem ID. In case of a mismatch you'll need to confirm the flash with 'y'. NOTE: Users with a non-US keyboard might need to press 'z' or similar, because the 'y' isn't at the same location for all keyboard layouts. SLI users will need to flash each card separately. The concept stays the same, but you will need to use the corresponding adapter index to flash a card. How to figure out the adapter nr. is described above. Flashing goes like this: nvflash -i[index] -6 vbios.rom [index] represents a number, namely the index you found with the 'nvflash -a' command. So a command example to flash a card which has index 0 is: 'nvflash -i0 -6 vbios.rom' When the flashing starts, just wait until it says that it's done. Then reboot with Ctrl+Alt+Del and remove your USB drive. Pro tip: Let me know if I missed anything important or if you have questions.