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Old 14-08-08   #1
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BIOS MOD: 8800GT to 9800GT


Guide to flashing your nVIDIA GPU Bios

1) Create a bootable floppy disk or a bootable USB stick (instructions below)

2) Download the latest version of nvFlash v5.67. Extract and copy nvFlash.exe and cwsdpmi.exe onto the floppy/ USB stick

3) Download the 9800GT bios files from MVKTECH.NET (Thanks to 'ginko' uploaded the file.) or my modded file from below and copy the *.rom file to the floppy/ USB stick

4) Boot the computer from floppy in bios. After the floppy disk has loaded, type “a:/nvflash -5 -6 9800GT.rom" without quotes, and press enter.

5) Follow the program and press ‘y’ whenever asked

6) You're done, your card now has been modded...

- You can either use the above eVGA 9800GT SC Bios... or download my modded version (attached below)

- The modded version includes the '8800GT Bios V-Mod' (1.1v instead of 1.05v) and modified clock speeds of 700/1728/1000. I've also increased the fan speed to 60%...

- I've flashed my eVGA 8800GT KO Edition successfully. Have tried a few games including PES 2008, Crysis and Grid.

- So far there haven't been any big differences... So it's just bragging right's... no performance increases...

- However, it atleast proves that the 9800GT or atleast some 9800GT's are indeed re-badged 8800GT's...


Creating A Bootable USB Stick

1) Download the HP USB Boot Disk Creator and Win98 Startup Disk Files

2) Extract the startup disk files boot files to a folder of your choice

3) Run the HPUSBFW program. Select the correct USB device from the drop-down menu, set file system to FAT32 and check Create a DOS startup disk.

4) Browse for the extracted boot files (now in the folder of your choice) and press start to begin formatting it.

4) You're Done!



Creating a Bootable BLINDFLASH USB Stick/ Floppy

Usually when the VGA bios gets screwed... either you'll get no display or graphical corruption. In that case, you can use a Blind Flash disk. A Blind Flash Disk is a MS-DOS startup disk which can automatically restore the original VGA bios...


1) Create a Bootable Floppy or a USB Stick (as shown above)

2) Download the latest version of nvFlash v5.67. Extract and copy nvFlash.exe and cwsdpmi.exe onto the floppy/ USB stick

3) Backup your original VGA bios with NiBiTor and save the bios as 8800GT.ROM

4) Copy the 8800GT.ROM onto the floppy/ USB stick

5) Download the Autoexec.zip from below. Extract and copy Autoexec.zip onto the floppy/ USB stick

6) You're Done!



Disclaimer
* In case you screw up your card, I am in no way responsible, you do this at your own risk... I'm just spreading the word.

* Backup your original VGA bios with BIOS utilities such as NiBiTor, before attempting to flash your card
Attached Files
File Type: zip Autoexec.zip (182 Bytes, 1895 views)
File Type: zip 9800GT.zip (39.4 KB, 3414 views)

Last edited by Ad1tya; 17-10-08 at 12:39 PM.
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Old 15-08-08   #2
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Re: BIOS MOD: 8800GT to 9800GT

would have tried it if I had a 8800 GT
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Old 15-08-08   #3
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Re: BIOS MOD: 8800GT to 9800GT

Just one question - how do you get the idea in the very 1st place to put 9800GT's BIOS in a 8800GT ?
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Old 15-08-08   #4
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Re: BIOS MOD: 8800GT to 9800GT

the 9800 GT is nothing but a bios modded 8800GT
so it an 8800GT can easily be modded by users into a 9800GT
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Old 15-08-08   #5
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Re: BIOS MOD: 8800GT to 9800GT

Originally Posted by iosoft View Post
Just one question - how do you get the idea in the very 1st place to put 9800GT's BIOS in a 8800GT ?
You'll find your answers in these articles...

ECS GeForce 9800 GT is a 8800 GT in a blue disguise

GPU Review

GeForce 9800 GT is a rebranded 8800 GT

Last edited by NeViLLe; 15-08-08 at 11:25 AM. Reason: ECS GeForce 9800 GT is a 8800 GT in a blue disguise
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Old 15-08-08   #6
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Re: BIOS MOD: 8800GT to 9800GT

Originally Posted by iosoft View Post
Just one question - how do you get the idea in the very 1st place to put 9800GT's BIOS in a 8800GT ?

The idea is that u get to show off to ur ignorant friends that u got a new 9800GT!!!
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Old 15-08-08   #7
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Re: BIOS MOD: 8800GT to 9800GT

anybody tried this with MSI 8800GT OC version ??
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Old 16-08-08   #8
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Re: BIOS MOD: 8800GT to 9800GT

Originally Posted by codereverser View Post
anybody tried this with MSI 8800GT OC version ??

Not yet , but i want to know why would you do that? i mean..isnt the OC'd version good enough already?? why risk your card when there are no actual gains in the performance level? just to show off?

naaa...i am better off with my 8800 gt standard OC...
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Old 16-08-08   #9
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Re: BIOS MOD: 8800GT to 9800GT

does this void warranty?
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Old 16-08-08   #10
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Re: BIOS MOD: 8800GT to 9800GT

Originally Posted by arihant3123 View Post
does this void warranty?
Offcourse... Modding = No Warranty
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Old 18-08-08   #11
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Re: BIOS MOD: 8800GT to 9800GT

hi im new here

does this work with every 8800 GT ? i have a MSI 8800 GT with a Zalman cooler...

edit: and is the volt mod very risky?

Last edited by RoF; 18-08-08 at 09:25 PM.
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Old 18-08-08   #12
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Re: BIOS MOD: 8800GT to 9800GT

Originally Posted by RoF View Post
hi im new here

does this work with every 8800 GT ? i have a MSI 8800 GT with a Zalman cooler...

edit: and is the volt mod very risky?
Should work with all 8800GT reference cards... I guess it should work with MSI 8800GT... (anyways backup the original bios and create a blindflash disk before trying it)

The volt-mod is not harmful... since the increase is only 0.5v
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Old 18-08-08   #13
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Re: BIOS MOD: 8800GT to 9800GT

Ya, OK for R&D but useless anyways, I don't see the point of this, Don't take this personally but this is a waste of time. Would recommend using riva tuner for performance though if your method had performance gains. Good to know that 8800gt = 9800 gt (if true), another shame for Nvidia.
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Old 18-08-08   #14
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Re: BIOS MOD: 8800GT to 9800GT

Originally Posted by sds333 View Post
Ya, OK for R&D but useless anyways, I don't see the point of this, Don't take this personally but this is a waste of time. Would recommend using riva tuner for performance though if your method had performance gains. Good to know that 8800gt = 9800 gt (if true), another shame for Nvidia.
i will try it out tomorrow, but if it work it will increas the performance of my 8800 GT because 1) the 9800 GT have higher core takt (600 - 700) and 2) the higher voltage will grand higher oc results... so big thanks if it works ... but it think it ll work

sry for my bad english im german^^ but i googled for this so long and here i found it first ! so big thx!

Last edited by RoF; 18-08-08 at 11:53 PM.
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Old 19-08-08   #15
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Re: BIOS MOD: 8800GT to 9800GT

Originally Posted by RoF View Post
i will try it out tomorrow, but if it work it will increas the performance of my 8800 GT because 1) the 9800 GT have higher core takt (600 - 700) and 2) the higher voltage will grand higher oc results... so big thanks if it works ... but it think it ll work

sry for my bad english im german^^ but i googled for this so long and here i found it first ! so big thx!
wow..lots of people from abroad are getting good results from google for this site.just some days back some guy from the us googled for the 4870 and ended up here.go erodov!
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