CHAPTER EDITING FERMI BIOS:

LAST UPDATE 17/Sep/2011.

(update for the Fermibios calculator)

You can download the GUIDE in PDF with the GUIDE for flashing NVIDIA bios in PDF and tools needed for this, here

WHAT IS IN THE DOWNLOAD PACKAGE:

Why is this tool now public = http://forums.guru3d.com/showpost.php?p=3827556&postcount=38

You can download our fermibiosCalculator here at Guru3D:

You need NVFLASH 5.1.. or higher for the new GTX5..serie

Open your saved bios with NiBiToR or Fermi BIOS Editor , after you are done editing your bios always save it as a .rom file or NVFLASH will not work.

FERMI BIOS Editor guide.

(No future development , newer gpu's then GTX570 and 580 will not be supported)

Open your saved bios with Fermi BIOS Editor , after you are done editing your bios always save it as a .rom file or NVFLASH will not work.

1:FANSPEED.

2: Voltage settings.

Note: the minimum you can go with FERMI is 0.825V.

3: Clock & Memory settings

CHANGING CLOCKS:

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"NiBiToR" Fermi BIOS editing guide.

Open your saved bios with NiBiToR , after you are done editing your bios always save it as a .rom file or NVFLASH will not work.

1:FANSPEED.

2: Voltage settings.



Note: the minimum you can go with FERMI is 0.825V , NiBiToR lets you go lower but it will not work !!!!!!!!!!!!!!!!!!!!

3: Clock & Memory settings.

New: use our FermibiosCalculator , it does it all , it calculates the right values and it shows you where to put them in NiBiToR :

For the clock/shader speed and memory speed we made a real easy to use tool , "FermibiosCalculator" , this tool does all the calculations for you and shows you where to put the values in NiBiToR. We made this tool because NiBiToR doesn't do the calculations for you. Here it is :

Just type in your new shader speed and memory(not needed if you don't change it) and select your GPU , this app will calculate the values (bumped shader )and show you where to put them in NiBiToR in the P12 level and or P15 level depending on what GPU. The tabs that stay blank you DON'T change !!

Supported cards are: GTS450, GTX460SE, GTX460, GTX460 ASUS TOP, GTX470, GTX480, GT520,GTX550ti, GTX560, GTX560ti, GTX570, GTX580, GTX590.(can change)(If you use this please read the "read me" file !!)

CHANGING CLOCKS:

"NiBiToR" (Tools - FERMI Clocks)

When you change the "Shader" speed then the "Bumped shader" speed must be adjusted!!!!!!

There are differences between the Fermi GF100 and GF110 like the pictures shows.



-For the (GF100) GTX465 , 470 , 480 the rule is to put in TAB4 the new calculated "bumped shader" value and in TAB11 the same value as your new SHADER speed!!!!!!!!!!!!!!

[FONT="]Also the ASUS GTX460 DirectCU TOP)[/FONT]



-For the (GF110, GF104 , GF114) GTX460 , 570 , 580, 590 and GTX560ti you put in TAB4 and TAB11 the new calculated "bumped shader" value!!!!!!!!!!!!!!!!!!

[FONT="]except the ASUS GTX460DirectCU TOP)



[/FONT]

ASUS GTX460 DirectCU top is exception on this rule.

In the Asus GTX460 DirectCU TOP bios the overclocked Shader speed is in Tab 0 , 1 , 3 and 11

Only in tab 4 they put the Bumped shader speed.

(center BIOS = ASUS DirectCU TOP , all bioses are version 70.04.13.00.01 , so it is something ASUS does to this bios with this card)

If you edit the ASUS GTX460 DirectCU TOP bios with "FERMI BIOS EDITOR 1.55" things are adjusted automatic in the way ASUS does in the DirectCU TOP card.

Or use the FermibiosCalculator and select GTX460 ASUS Top card.

How to calculate the "bumped shader". Or use the FermbiosCalculator.

1431

1350

1272

1215

1272

1215

1472

1401

1539

1464

1620

1544

1272

:

1215

= 1.04691

1744

1645

The rule :

"bumped shader (tab4)"

"shader (tab3)"

Examples:

1:Changing the clocks on the GTX480 (GF100)

1512

1590

1590

1512

Warning for GTX 460 , 465 , 470 , 480!!!!

Not for GTX 570, 580,590 and GTX560ti.

Or use the FermbiosCalculator it shows this !!





2:Changing the clocks on the GTX570 (GF110)

1600

1680

1680

1600

TIPS:

Finish every editing with "APPLY" and save your edited bios as a (.rom) file.





ALWAYS REINSTALL THE NVIDIA DRIVER AFTER FLASHING BIOS.



REMOVING POWER-DRAW LIMITER WITH GPU-Z WILL RESULT IN BURNED VRM'S !!!!!! (This is a fact for the GTX570) http://www.overclock.net/nvidia/929152-have-you-killed-570-a.html

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Some INFO on the GTX590

The latest NVIDIA driver won't even allow voltage Tweaking with software.

My advice on the GTX590 is NO OVERVOLTING!!!!!!!

GTX590 BIOS Screen



Changing the original BIOS and flashing your GPU will void your warranty. ALWAYS MAKE BACKUP OF ORIGINAL BIOS with NVFLASH or GPU-Z.

How to backup your original BIOS and how you flash your NVIDIA gpu is explained here :

If you have questions about the "FERMI BIOS EDITOR" tool or you want your BIOS to be edited for voltage Maximum and Fan speed "BetA13" is the person to talk to.

You find his thread here :

DRIVER 280.19:

CIVATO 2011 (THX to BetA13 for extra INFO)

Thanks to Crispyi for the help on the FermibiosCalculator !!