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Just posted this here so you oc'ers could enjoy this guide !!! I started this at Guru3D.

CHAPTER EDITING FERMI BIOS: (This is a work in progress , this is based on my findings and my two GTX570's) LAST UPDATE 08/April./2011.

You can download the GUIDE in PDF with the GUIDE for flashing NVIDIA bios in PDF and tools needed for this, here
:http://www2.zippyshare.com/v/65627535/file.html

WHAT IS IN THE DOWNLOAD PACKAGE:

-FERMI BIOS EDITOR 1.55 (no further support) and for help with this tool see here http://forums.guru3d.com/showthread.php?t=329033 .
Why is this tool now public = http://forums.guru3d.com/showpost.php?p=3827556&postcount=38

-NiBiToR.v6.01 (use the latest) 6.02 is also in package but this version gives red or yellow integrity when you open a bios , to solve this you need to do a rescan of the bios in the "ADV info" tab.

-nvflash.v5.100.0.1 (use the latest)


-USBimage w7 ( for making a bootable USB, tested with windows7 64bit)

-HP USB Disk Storage Format Tool ( need it to make the bootable USB)

-GUIDE "HOW TO FLASH "with images in PDF, how to use NiBiTor and how to save bios with GPU-Z or with the flash tool in DOS and the command prom. that you need in DOS.http://forums.guru3d.com/showthread.php?p=3433513#post3433513

-GUIDE with images like in this post for how to edit your FERMI bios(PDF)

-Fanspeed IC NiBiToR guide (PDF) for 8...- 2.. series

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. Only possible with GTX460 and GTX5.. serie.
Changing the default fan settings (40%-85%) .You can change the minimum and maximum "fan speed" that can be controlled with software to the desired values. For example that the fan can ramp up to 100%.



2: Voltage settings.
Here you can change the voltage settings of every P-STAGE


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

3: Clock & Memory settings.
CHANGING CLOCKS: (Core and shader are linked with FERMI)



"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. Only possible with GTX460 and GTX5.. serie.
Changing the default fan settings (40%-85%) .You can change the minimum and maximum "fan speed" that can be controlled with software to the desired values. For example that the fan can ramp up to 100%.



2: Voltage settings.
Here you can change the voltage settings of every P-STAGE



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.

CHANGING CLOCKS: (Core and shader are linked with FERMI)

"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!!!!!!!!!!!!!!

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


How to calculate the "bumped shader".

I calculated the value that you need to multiply with your new "shader speed" to get the new "bumped shader" value.

Here are the values for each card .

GTX460 = 675/1350/1800MHz = 1431:1350 = 1.06
GTX 465 = 607/1215/1603MHz = 1272:1215 = 1.04691
GTX470 = 607/1215/1674MHz = 1272:1215 = 1.04691
GTX480 = 700/1401/1848MHz = 1472:1401 = 1.05067
GTX570= 732/1464/1900MHz = 1539:1464 = 1.05122
GTX580 = 772/1544/2004MHz = 1620:1544 = 1.04922
GTX590 = 607/1215/1707MHz= 1272:1215 = 1.04691
GTX560ti = 822/1645/2004MHz = 1744:1645 = 1.06018

(NOTE: the calculation of these values are based on the stock bios settings of every card)

The rule : divide stock "bumped shader (tab4)" with stock "shader (tab3)" , the result of this you multiply with your new "shader speed (tab3)" and the result of that is the new "bumped shader speed".


Examples:

1:Changing the clocks on the GTX480 (GF100)

Stock settings on this "factory-occard: "Shader":1512 (tab3 & 11) , "Bumped shader":1590 (tab4) , Memory 1900(tab5)

This card runs at stock "factory-overclock" 756/1512/1900MHz

We are going to change this to 800/1600/2000MHz.

Memory : change the value in tab5 to 2000.

Shader: change value in tab3 & 11 to 1600.

Bumped shader: 1590/1512 = 1.0515873 x 1600 = 1682.53968 = 1682 in tab4

Warning for GTX 460 , 465 , 470 , 480!!!!
Not for GTX 570, 580,590 and GTX560ti.


2:Changing the clocks on the GTX570 (GF110)

Stock settings on this "factory-oc card: "Shader":1600 (tab3) , "Bumped shader":1680 (tab4 &11) , Memory 2000(tab5)

This card runs at stock "factory-overclock" 800/1600/2000MHz

We are going to change this to 850/1700/2200MHz.

Memory : change the value in tab5 to 2200.

Shader: change value in tab3 to 1700.

Bumped shader: 1680/1600 = 1.05 x 1700 = 1785 in tab4 & 11

TIPS:
-I did find that with GTX570 , 580 and GTX560ti that when you put in tab 0 and 1 the same value as the new shader speed (tab3) in the P15 level the overclock was more stable , meaning that "the driver not responding" message didn't appear so fast after a oc.

-When you are on watercooling are other exotic cooling, set the fan speed at 0% (min and max) , I noticed that i can get higher speeds with lower voltage if I do this , I think that when you do this the fan controller on the card is disabled so it don't need no more power.

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


Some INFO on the GTX590

The GTX590 got a P14 level , this level is the downclock level , when the card got to much powerdraw the card will trotlle down to these clocks.
Core=553MHz / Shader =1107MHz and Memory=1603/3206MHz Effective datarate.
It will use the voltage setting 1 .

You can not see these clocks trottling down , your software will show the default clocks 607/1215/1707MHz. The only thing where you will notice is that your FPS will drop down.


So overclocking this card its hard , you need to find the max voltage before you notice that your FPS in games are dropping down. Better to just try raising the Clock speeds and NO Voltage tweak.

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

I think the highest stable clock that you can get without voltage tweak is 680/1360/1850MHz(3400MHz)

This p14 level will be activated by the driver. (Ex: Running Furmark will activate this and some other stress programs)

The GTX590 is a bad overclocker if you want to tweak voltage ,If you put the voltage to high the powerdraw limiter will kick in faster.

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

GTX590 BIOS Screen

GTX590.png



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 :http://forums.guru3d.com/showthread.php?t=313989

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 :http://forums.guru3d.com/showthread.php?t=329033

CIVATO 2011 (THX to BetA13 for extra INFO)

You can also follow this thread here http://forums.guru3d.com/showthread.php?p=3838406#post3838406

Because of updating the guide and download packages sometimes the one at guru3d (link above) is always up to date.
 

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Quote:
Originally Posted by turokhan View Post

hi,
May be a dumb question, but where is the core speed adjustment?
All i am seeing here is shader and memory adjustments...
Core will automatically be 1/2 of the shader value you set
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