The above pictures are of the Ray Nvidia Bios Editor , this is the software I used to modify my bios. Simply chose capture , this will copy the bios from your GF2 , then chose initialization ( pic 2 ) . On the left is the adjustments to sdr based cards , and on the right ddr based cards , the top line on the left is for your core speed and memory speed , simply adjust and then save the modified bios. Only chose and modify one , sdr or ddr , based on the type of card you own , do not attempt to change both , you have been warned .

Now you need nvflash.exe to flash your modified bios to your graphics card , now just in case , you may want to test the modified bios first , vgabios.exe will allow you to temp force your graphics card to run on the modified bios , simply rebooting your computer will put things back to normal . Its a good idea to test your modified bios first , just in case , now , if you are happy with your modified bios you flash it to your card . If you have never flashed a bios before , go to the bottom of this page.

IMPORTANT

Depending on the type of card you own , SDR or DDR based, and how fast it is , ( GF2ti , this is one card I personally would not touch ) you have to think about the risk you are taking and if the gains are worth it . GF2mx owners , think about it , do you want to kill your card over 5 extra frames in quake , or 200 extra 3Dmark2001 marks. On the other hand what the hell , ( time to upgrade the graphics card in anyway ) so if I kill it , no real loss . Its all a new ball game , and isn't OCing supposed to be about new frontier's . And on that note , how far is too far , I changed my core speed from 175mhz to 183mhz and the mem speed from 166mhz to 190mhz . It worked fine except for the spotting , which is bad ( graphics card developing errors ) . I backed the core of to 180mhz and the mem to 185mhz , only very slight spotting now. Obviously this shows just how lacking my GF2mx is in overclockability , so you beware , less you do permanent damage to your own card.

COMMANDS

vgabios.exe ( temp-flash for testing modified bios ) vgabios -fname.rom . This is the command for installing the temp bios . name.rom = The name you gave to your saved bios.

nvflash.exe ( perm-flash for bios ) nvflash -fname.rom . This is the command for installing your modified bios

HOW TO FLASH

Save all the files you are going to need ( vgabios.exe , nvflash.exe , dos4gw.exe ) to a 3.5 floppy , as well as your modified bios , ( you may want to save a copy of your orig bios somewhere safe just in case ) . You must flash from dos , so close windows , go to a: drive and type in the command , nvflash -fname.rom , and sit back as your modified bios is installed , the same procedure is used for testing the bios . Its that easy .

LINK

This link will take you to a non-english site that has nvflash and a bios editor called bios mod 252 , I can't vouch for 252, as I have not used it yet . Click Here. There is a fair bit of software out there , you just have to look for it . If you folks are having problems finding the software , I might post the software I used , in yahoo groups or something?   updated: Nvidia Bios Editor - download from here .

WARNING

Modifying your bios ( the more mods you make , the better the chance it wont work ) could kill your graphics card . If you kill your graphics card you will need a pci graphics card, change your bios settings to make pci the primary vga , leave your GF in the agp slot and re-install your old bios the same way you installed the modified bios . This will hopefully bring your card back to life , again , you have been warned.

updated: Beware folks , its one thing to use software to overclock your graphics card once it has warmed up , cold booting after doing a bios mod could damage the ram or core if the clock speed is set to high , ramsinks and possibly a larger cooler on the GPU just might be necessary . again , you have been warned .