Extracting video BIOS from main BIOS

[WaroDaBeast]

Hey guys,

I was looking for a way to extract my GPU's BIOS from my computer's main BIOS, and came across this thread: http://www.techpowerup.com/forums/showthread.php?t=117579

So, I decided to ask for help here. The computer in question is a laptop — an Asus A6Vc to be accurate. Here's a link towards the BIOS I'm using (which also happens to be the latest BIOS): http://dlcdnet.asus.com/pub/ASUS/nb/A6Vc/A6Vc0205AS.ZIP

Anyhow, my goal is to try a tweak my GPU's voltages. If I can gain access to other neat features in the main BIOS as well, that'd be really awesome.

Not expecting much, of course. but it'd still be nice if I could mess around with the BIOS settings.

 

[LiveOrDie]

Save your bios with GPU-Z and edit it with NiBiTor.

 

[WaroDaBeast]

Silly me, I forgot to mention what actually matters. I will never change. -_-

Anyway, my problem is, nvflash can't identify my GPU, which is a Geforce go 6200. I can't remember if I can save its BIOS with GPU-Z (though I most likely can) 'cause I haven't used Windows on it for quite some time. Installing windows to get the BIOS via GPU-Z or some other piece of software is feasible though, if that needs to be done.

But yeah... Trying to save the GPU's BIOS with nvflash gives me an error message about the BIOS being 0 kB, and about the graphic adapter being unidentified. If I use the --check suffix, I get something about the EEPROM not being found. That's with version 5.50 — earlier and later versions than this one won't even give me the latter error message.

This led me to think that I have to look into the main BIOS to access those settings. Am I looking in the wrong direction?

Thanks in advance.


P.S.: NiBiTor opens and saves the BIOS just fine (I tried with a BIOS from a similar model in TPU's database), but gives an error about the device ID not being supported (device id is 0167).

 

[OneMoar]

your chip does not have any voltage control editing the bios will not do any good
you can't make changes to a igp bios anyway its embedded into the system bios
its very very very very very very very VERY old
..

 

[WaroDaBeast]

Well, I just wanted to edit the voltage table to see if I could lower those voltages, so as to eke out a couple more degrees. Maybe I need a hard mod then...

What...? Gotta need to start somewhere, so I might as well do it with an old computer.

 

[OneMoar]

Well, I just wanted to edit the voltage table to see if I could lower those voltages, so as to eke out a couple more degrees. Maybe I need a hard mod then...

What...? Gotta need to start somewhere, so I might as well do it with an old computer.

there is no _control_ on that chip it runs at the same voltage 24/7 there is physically No way for software to control it

 

[WaroDaBeast]

there is no _control_ on that chip it runs at the same voltage 24/7 there is physically No way for software to control it

Yeah, I got that the first time you replied. Thanks for confirming what I already thought.

EDIT: Turns out I had to use MMTOOL to extract the video BIOS, only to replace the original version by the modded one (edited with NiBiTor, of course). Then, I flashed with the regular program Asus gives you to flash this particular laptop.

Now, did it actually change the voltages? That remains to be seen.