GIGABYTE GeForceTM FX 5700 Graphics Accelerator GV-N57256V - Manual (Page 33)

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3. Change the command path to the file location C:\> or A:\>
4. Backup BIOS command : C:\> nvflash -b <filename>
5. Reflash BIOS command as below : C:\> nvflash -f <filename>
5. Reboot your PC when it's done.
5. Appendix
5.1. How to reflash the BIOS
We use GV-N4464D VGA card and NVFLASH BIOS flash utility as example.
How to reflash the BIOS for your graphics card?
1. Extract the Zip file to the drive C: or A:
2. Restart your PC in MS-DOS mode.
(This function only for Windows 98/98SE, If your OS is Windows 2000/ Windows ME/
Windows XP. Please use the bootable disk to MS-DOS mode.)