NVidia: How To Flash a Video BIOS for Hardware Overclocking
DISCLAIMER: 
The methods outlined below can cause irrecoverable damage to your hardware and should not be performed unless you ABSOLUTELY know what you are doing.
WARNING: This modification has not been tested on ANY GeForce 4 Ti video card with 8x AGP support (NV28) or GeForce FX (NV30/31/34/35/36). Apparently, the new X-BIOS Editor Version 520 DOES have proper support for these devices.
DO NOT, UNDER ANY CIRCUMSTANCES, ATTEMPT THIS MODIFICATION ON AN ATI-BASED VIDEO CARD. THIS GUIDE IS STRICTLY FOR NVIDIA-BASED VIDEO ADAPTERS. |  |
NVidia: How To Flash a Video BIOS for Hardware Overclocking:
Introduction:
Sick of having to constantly play with slider settings to overclock your NVidia-based video adapter? Want to overclock a piece of hardware permenantly so no matter what system the card is installed in, it is always operating at your desired clock speed? This guide will show you how to do just that, eliminating the need for any 3rd party software utilities to overclock your card (such as PowerStrip, RivaTuner or CoolBits).
Legal Disclaimer:
WARNING: Myself, Short-Media or any of Short-Media's subsidiaries are NOT responsibile for ANY damage, abnormal system behaviour, graphics corruption, game incompatability or data loss that may occur to your hardware (and supporting systems) from performing this modification. By following this guide, you acknowledge that you have read and understood this warning, you are aware of the inherint risk of modifying computer hardware, you are aware that this modification will VOID any warranty that you currently have on your NVidia GeForce-based video adapter and that you are solely responsible for any damages or abnormalities that occur with the video card.
Software Required:
->
DumpBIOS
->
X-BIOS Editor 1.0 Version 520
->
NVFlash 4.41
->
dos4gw.exe
->
Windows 98 Boot Disk (someway to get to a REAL DOS prompt)
Steps To Perform Modification:
1) Copy the following files to a freshly formatted floppy disk:
DumpBIOS.exe
NVFlash.exe
dos4gw.exe
2) Restart your PC with the Windows 98 Boot Disk.
3) Insert the floppy disk with DumpBIOS on it and type "dumpbios" at the command prompt. This should save a copy of your CURRENT video card BIOS to the floppy.
4) Restart your PC to Windows and install the "X-BIOS Editor".
5) Open your saved BIOS file from the floppy disk with the "X-BIOS Editor".
6) Click on the "Initialization" tab.
7) Change the core clock (GPU) speed on each & every line.
8) Change the memory speed on the FIRST LINE.
9) Save the edited BIOS file to the floppy disk (using a different name than the one given to the BACKUP of your ORIGINAL video card BIOS, such as "newbios.bin").
10) Restart your PC with the Windows 98 Boot Disk.
11) Insert the floppy disk with NVFlash (and your new BIOS image file) and enter "nvflash.exe /f newbios.bin" (without the quotes and substituting newbios.bin with the actual file name).
12) Restart your PC.
Your video card will now be permanently overclocked to whatever values you set in the BIOS image file.
Originally found @ OverClockers forums.
Instructions adapted & re-vamped by SimGuy.
Files downloaded & organized by SimGuy.