The process of modifying BIOS by graphics card is similar to that of motherboard. Generally, the original BIOS of the graphics card is extracted for backup, and then modified by modifying the software (this step can be skipped in some cases), and finally the modified file is brushed back to the BIOS. In the following, the author introduces the refreshing methods of A card and N card respectively.
First, the NVIDIA graphics BIOS is refreshed.
Because BIOS refresh works more reliably in pure DOS state, it is necessary to prepare a win98/ME boot CD to boot the system into pure DOS environment. Below, the author takes NVIDIA's special refresh tool NVFLASH as an example (the storage path of NVFLASH is D: \nvflash, note: nvflash cannot be placed in Chinese directories such as "D:\ Graphics Tools").
STEP 1 backup graphics BIOS
In order to prevent the graphics card BIOS from failing to refresh, it is necessary to extract and back up the original BIOS. Use the startup disk to enter the pure DOS environment, enter the D disk, and then enter "cd nvflash" to enter the storage directory of nvflash. Finally, enter the BIOS backup command "nvflash -b backup.rom", and the graphics card BIOS will be backed up to a rom file named backup. The whole operation process is as follows.
The backup.rom file generated by backup is stored in the folder where the NVFLASH software is located by default, as shown in the following figure.
Step 2 modify the BIOS file
This step allows users to modify the BIOS according to their own preferences. If the user wants to brush in the BIOS and find the new ROM file on the manufacturer's website, he can skip this step.
After restarting, return to the windows system and modify the backup.rom file with nVidia_BIOS_Modifier software. Open the "Open BIOS Image" command in the "File" menu to open the just saved backup.rom file. The software includes general information, voltmeter, performer list and temperature sensor &; Timings "four tabs, due to space reasons, I won't elaborate here, only give the general function of each tab, leaving more functions for readers to explore. "
The basic information of the graphics card can be modified in the "General Information" tab, and users are advised not to change the information here.
The core voltage shall be modified, but it shall not exceed 10% of the default voltage.
According to the modified core voltage, different frequencies and usage specifications can be determined in this tab, and the user can pass the overclocking software test and the final frequency.
Modifying the memory timing may also improve the efficiency of the graphics card, but it is not recommended for beginners to modify the memory timing.
After the user modifies the above options according to his own needs, click the "Save BIOS Image" command in the "File" menu to save the modified BIOS file as new.rom and save it in the folder where NVFLASH is located.
Step 3 Refresh the graphics BIOS
Finally, we can brush the modified BIOS back through NVFLASH. The command to refresh the graphics card is: nvflash-4 -5 -6 new.rom (if the user uses a new BIOS file downloaded from the Internet, change "new" to the downloaded rom file name, as shown in the following figure).
During the refresh process, the screen will shake and turn black for about 10 second. If the system returns to the DOS interface again, the refresh is successful.
Tip: When nvflash is used with various command parameters, it can achieve different functions:
-f: Write the BIOS file named "filename" into the ROM chip of the graphics card, and then check it.
-4 -5 -6: Write the BIOS file named "filename" into the ROM chip of the graphics card, but ignore the mismatch between the BIOS file and the graphics card and force refresh.
-b: Read the BIOS from the rom chip of the graphics card and save it with "file name".
-k: Read the BIOS from the rom chip of the graphics card and compare it with the BIOS file named "filename".
-c: Check whether the ROM chip of the graphics card supports refreshing.
-h: Restart the machine after the BIOS upgrade is completed.
-? : Get a detailed description of the refresh program, including command line parameters, supported ROM chips, etc.
Note: When some graphics cards are refreshed with BIOS conforming to the graphics card model, the -4-5-6 parameter will not work normally, and the bad parameters can be refreshed directly.
Second, ATI graphics BIOS refresh
The refresh method of A card is similar to that of N card mentioned above, but the software used is different.
Step 1 extract graphics BIOS
Here we use ATIWinflash to extract the graphics BIOS. After starting ATIWinflash under windows, click the "Save" button to save the BIOS information of the graphics card in the atibackup.com file.
Step 2 modify the BIOS file
This step allows users to modify the BIOS according to their own preferences. Users can skip this step if they want to find the new BIOS file on the manufacturer's website.
A card BIOS modification I recommend the Chinese version of ATI Radium BIOS Tuner, which has a simple operation interface and is more suitable for beginners after Chinese translation. Click the "Open" button to load the atibackup.com file saved in the previous step, as shown in the following figure.
Readers can modify the graphics card device information, core voltage, core frequency, memory frequency, CL, RCD, RP, RAS and other parameters according to their own needs. Click "Save As" after the modification, and save it as a new.rom file (not in the Chinese directory such as "D:\ Graphics Card Tools").
Step 3 Refresh the graphics BIOS
Flashrom is used here, a card BIOS refresh tool. Restart the machine to enter the pure DOS environment and enter the folder where at new. rom generated in the previous step is located. Enter "flashrom-p0atinnew.rom" at the command line, and then press enter, and the program will write the new BIOS into the BIOS chip of the current graphics card. After waiting for a few seconds, if there is no error message, you can restart the computer. (Note that there is a space between "Flashrom" and "-p" when you enter the above command; There is also a space between "-p" and "0", where 0 is the number 0, representing the number of the graphics card in the system, and there is also a space between 0 and atinew.rom)
Tip: When Flashrom is used with various command parameters, it can achieve different functions:
-p: Write a BIOS file named "filename" into the ROM chip of the graphics card.
-s: Back up the BIOS file in the ROM chip of the graphics card and name it "file name".
-i: displays the parameter information of ATi graphics card.
Third, the solution to the failure of the graphics card to refresh the BIOS
If the display screen appears or is unstable after refreshing, the backup bios file should be refreshed back to the graphics card, and the specific refreshing method is the same as refreshing the new BIOS (note: it is best to use the nvflash -f command when refreshing the original BIOS with nvflash, but according to my experience, it is sometimes impossible to use the forced refreshing nvflash -4 -5 -6).
If there is a black screen after refreshing, the remedy is as follows: firstly, unplug the damaged AGP or PCI-E graphics card, plug in the PCI graphics card, start the computer, enter the BIOS setup program of the motherboard, select the Intergrated Peripherals option, change the value of the first item of Inti Display to PCI SLOT, and then save the settings and turn it off. Then plug in the AGP card or PCI-E, but still connect the monitor to the PCI graphics card, then restart the computer, and finally brush back the correct ROM file according to the previous refresh method. If there is no PCI graphics card, the motherboard supports dual PCI-E graphics cards. You can insert two different brands of graphics cards into the motherboard and refresh it again. For example, if the ATI graphics card of PCI-E is damaged, then insert an NVIDIA graphics card.