Unlocking voltage limit and flashing FERMI BIOS guide.
This is a collaboration of information(like any other guide is
I see some guys are maxing out voltage on the 560 and want to overclock higher. Well if you can handle keeping your card cool then I have just the thing for you!
If you break your card, I hold no responsibility.
try this at your own risk.
First off let me start by saying, our gtx 560 ti's used to be unsupported by nibitor so I cant guarantee this will work with everyones card.
This is the way I have done it and it works. There may be other ways.
NOTE: this guide may be able to be used with other fermi cards. I have not tried so I cannot testify to it.
The usb format portion of this guide are from: http://www.techpowerup.com/printarticle.php?id=34
The programs you will need for this guide:GPU-Z(latest verison)nibitor(nvidia bios editor)nvFlash latest DOS VersionHP USB Disk Storage Format ToolDOS System files-Backup BIOS-
Firstly you will need to create a backup copy of your BIOS using GPU-Z.
The button in the screenshot is what you use to create a copy of your BIOS.
Make two copies, one we will modify and one will be our backup.(name the backup one accordingly)-Edit BIOS-
Next we are going to edit the BIOS.
Fire up nibitor go to File->Open BIOS
Next you will go to Tools->Fermi Voltage
In this screenshot it shows you the values and how high you can unlock it in the BIOS.
If you fully unlock to the MAX value, make sure to be careful when testing in Afterburner so you dont overvolt and fry your card.
Once set at the value you want, you will hit ok and then go to FIle->save bios.
It would be best to keep all your files in one folder for easy access.
Note : IF YOU WANT TO MAKE A FLOPPY OR CD FOLLOW THIS GUIDE
Otherwise continue for USB drive.
Next we will make a bootable USB drive.
First plugin your USB thumb drive.
Next fire up the hp disk format tool.
If you have ever formatted a drive in windows it looks almost identical.
For device, choose your usb drive.
for file system choose "FAT32"
Check the box that says "create a DOS startup disk"
click the radio button that says "using DOS system files located at:"
go to the directory where you extracted the dos system files that I linked earlier in the post.
Click start and grab some coffee.
Once done, copy your backup copy and modified bios copy to your usb drive.
Make sure the bios names are small file names(FAT filesystem doesnt like big names)
Also copy all the nvflash files onto the disk.
Once completed leave the USB drive connected and reboot your computer.You may want to print the last page or so of this guy to read it once youve rebooted into dos.-Flashing-
First thing you do next is set your USB drive to be the first boot device in the computer BIOS.
Obviously save and exit from the BIOS.
Once it reboots it should boot into your USB drive which will give you a DOS prompt.
If the nvflash and your bios files are on the root of the drive you can type the command "dir" to see the file names in case you forgot them.
If they are in a folder on the drive, you can type "dir" to find the folder and then type "cd FolderName" to switch to the folder they are in.
WARNING: if you power goes off during the flashing process your card will be bricked. I am not providing details on how to unbrick it.
NOTE: you can type nvflash -h and it will explain tons of functions we will not be using or covering in this guide.
next thing we will do is compare our newly modified bios to the one currently on the chip:
nvflash -k "modified bios name.ROM"
it will tell you if the bios is the same.
it should say that at some offset they differ but you should not get errors or anything like that.
It is normal if it says it differs at that one offset because that is where you changed the voltage at.
Next we will turn write protect off.
Now that is able to be wrote to you can flash the BIOS.
nvflash -f "modified bios name.rom"
if all goes well issue this command:
this turns write protect back on so you dont unintentionally write to it.
Reboot by pressing ctrl+alt+delete
change bios back to boot off of hard disk.
save changes and reboot.
boot into windows and open up afterburner.
the voltage slider should have gone up to whatever you modified the BIOS to.
Enjoy higher overclocks and higher temps!!!!
I hope this helps someone.
Credits go to tech powerup and stobeur(OCN member), also the whole OCN forum, the greatest forum on the internet where you will find tons of helping and amazing people. I did this guide in hopes to give alittle bit back.
If you see any incorrect information, PM me and I will fix it ASAP.
PS - If this helped you give me some rep