HOWTO: nVidia BIOS Flashing - Page 15 - Overclock.net

**CL3P20** · 08-27-07

the pencil is for the volt mod on the vRAM and the conductive ink is used to 'create' the lines in the pictures above..increasing voltage to the gpu core.

..solder is the only substitute, other than using a 'windshield de-fogger repair kit' and a needle to 'draw' the lines..that is the method I started with and eventually went to solder...since you are worried about having a "clean" card after you are done with it..the solder is out of the Q.

MasterShake · 08-27-07

cool so i can increase volts to the memory and do the other half when i get the pen. somehow lol.

**CL3P20** · 08-27-07

mem can be done with a pencil and a voltmeter...takes minutes, but is not needed until core speed is increased.

1. for gpu volt mod: Take the card out of the case, using either the 'pen' or a needle and some de-fogger repair goop..draw out the lines on your PCB to connect the 'dots'. You should only do the mod for 1.4v if you are on stock cooling. That should allow you somewheres in the realm of a 620mhz core.
2. Re-insert the card after its all dry, and proceed to use 'riva tuner' or 'powerstrip' to OC the gpu core..making sure to run 3d Mark every 20-50mhz you increase the speed, to ensure stability..and I dont mean just once either...run it back to back for an hour.
3. For the vMEM mod: you need a mechanical pencil or sharp number2 and a voltmeter set to measure in mili-ohms. Here is the pic for the vMEM mod ..now using a voltmeter, measure the resistance of the marked resistor [use both probes to measure across the resistor] and record the value. Next, with your pencil, draw on the resistor, from one side to the other..press firmly as if writing..not hard. After a couple of passes, measure the resistance again..you want to lower the resistance by ~20ohms..this will yield a new vRAM voltage of ~1.90v [ea. ~15-20ohms lower, from stock value = ~.5v increase in voltage]
4. Re- insert card and repeat step #2

this process should get you in the area of a 625mhz core clock and 1.8-1.9ghz memory, depending on cooling and memory IC type for your card.

Poser · 08-28-07

^^^^^^^+rep for being patient and a source of knowledge ^^^^^^^^

killbox · 08-28-07

i tried to change my bios since i couldn't change between 3d settings or 2d settings in rivatuner or coolbits. I also have default clock and mem of 250/266. I thought maybe i could change that by using a different bios?

killbox · 08-28-07

Also i changed the bios to a BFG fx 5500 bios 256mb and after i installed it it said it was only 128mb and when i tried changing the bios back to the backup it said firmware ID doesn't match and board ID mismatch.
please help me....because with the new overclocked settings in the BFG i am getting artifacts and freezing. This is extreme

**CL3P20** · 08-28-07

Quote:

i tried to change my bios since i couldn't change between 3d settings or 2d settings in rivatuner or coolbits. I also have default clock and mem of 250/266. I thought maybe i could change that by using a different bios?

That was a bad idea..your card might not even have the capability to change the voltages between 2d/3d mode...not to mention different voltages and/or different RAM IC types = a different memory timing set.

Quote:

i tried changing the bios back to the backup it said firmware ID doesn't match and board ID mismatch.

This is an easy fix..you are just not entering the proper command prefix.. what you need are the letter designations for flashing over your hardware ID. Heres a good walk through on the program

it should look something like this-> a:nvflash -p -u -f newbios.rom

Quote:

Now if your card behaves strangely, such as crashing in 3d, or artifacts, or crashes in coolbits, that means your card can't handle the new settings, and you'll need to restore to the original bios.

Here's how to flash back to original bios.
-Boot from nvflash with backup.rom floppy
-type "a:nvflash -p -u -f backup.rom" without quotes and press enter.

Toms hardware guide for BIOS flashing

killbox · 08-29-07

in nibitor the checksum for my backup bios is E5 what does that mean? I can't seem to flash it using the method above. It still says BOARD ID mismatch.
If i attach my BIOS can someone please fix it for me so i can use it?

**CL3P20** · 08-29-07

look on the first page of the Nibitor program..vendor ID..is it telling you, that your card is a different model number?

killbox · 08-29-07

i have attached what i can see on the advanced info page
http://img253.imageshack.us/img253/3452/untitledxu2.jpg- this is the backup bios i cant flash bak

http://img237.imageshack.us/img237/7...itled2qg6.jpg- this is the one that i flashed (to see if i could change 2d and 3d settings separately)

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HOWTO: nVidia BIOS Flashing

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