BIOS flash on a gtX260

So recently i got a gtx 260, that happens to be a zotac amp!2 overclocked card. Now, i'd like to overvolt it to 1.18v or 1.20v
After a really hard time trying to get a bootable usb drive, i managed it and loaded nvflash and the bios rom file. So i restart the computer, open the boot menu, select the usb flash drive and write nvflash -4 -5 -6 gt200.rom (gt200.rom is the name of the bios file), i get an error saying: ERROR: EEPROM not supported (something like this). Now i don't know what to do... :pfff: can someone help me? If needed, i'll post the system specs
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More about bios flash gtx260
  1. You don't have to flash the BIOS of your GPU to ramp up the voltage. You can use MSI Afterburner or GPUTool for example.
  2. [*** ed up ther card! That would suck, because i waited 8months to get the card. Hehe
    I hope this helps a lot of people. :hello:
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