How to Overclock Your Video Card

Making Changes Permanent (NVIDIA-Based Cards)

 
As we mentioned before, all changes made to your video card aren’t permanent. This occurs because the video card’s BIOS will instruct the VGA to run on its default configuration every time you reboot your PC. That’s why you need to keep PowerStrip loaded; it will load your personalized configurations and reconfigure your video card every time you load Windows. If you shut down PowerStrip, your video card will use the BIOS default configuration again.
You can edit the video card BIOS and make your overclocking permanent if this is what you want. With this option, you won’t need to load PowerStrip anymore, and the video card will always work under the clocks you programmed at its BIOS.
But don’t worry. In the future, you can reverse this change and make your video card run on its original configuration.
For doing this, you will need two programs: a BIOS editor (used to edit the BIOS contents, i.e., to change your video card clock rates) and a BIOS programmer (used to save the new modified BIOS to the video card). The programs you will need depend on if your video card is based on an NVIDIA or on an ATI chip. Below, we will show you how to modify your NVIDIA-based video card BIOS, and on the next page we will talk about how to do the same thing on an ATI-based video card.
For your NVIDIA-based card, you will need two programs: NiBiTor, which is a BIOS editor, and nvFlash, which is a BIOS programmer.
Run NiBiTor and first backup the BIOS your video card is currently using. If in the future you want to restore your video card’s original BIOS, just update your video card BIOS with this file.
Go to Tools, Read BIOS, Select device and select your video card. Then go to Tools, Read BIOS, Read into File. Give your file a name. This will backup your video card BIOS to a file. Then go to File, Open BIOS and load the BIOS file you’ve just saved. You will see a screen similar to Figure 22.

Figure 22: Editing your NVIDIA-based video card BIOS

As you can see, there are two places you will want to change: “Core” and “Memory.” Type in the maximum core and memory clocks that you know your video card can run and remain stable.
After editing these two fields, save the BIOS into a new file by going to File, Save BIOS. Now you have a BIOS file with your overclocked settings.
The next step is to create a bootable floppy disk. Go to https://www.bootdisk.com, select a DOS boot disk, download the .exe file, and run it to create your bootable floppy. Copy nvFlash.exe and your overclocked BIOS file to the floppy disk. Then boot your PC using this floppy (you may need to enter the motherboard setup and change the boot order).
At the command prompt, type:
nvflash file_name_of_your_overclocked_bios
Restart your computer and your work is done.