BIOS modding for GPU OC fun and profit!!

[seeker_moc]

hey seeker awesome work man.
can u just make a12 mod of the stock 775/1000 ? as i dont need to downgrade to a08 and again upgrade to a12 as i m already on a12...
thanks in advance

Here you go. Though like fakename said, you'll still have to downgrade first if you're already A12.

1645_A12_775_1000.zip

[King of Interns]

Hello Seeker Moc
Although I don't own a dell I do own a 4670 Would you be able to mod a 4670 bios for me. I run 775mhz on core and 985.5mhz on mem during games using rivatuner. The core can reach higher speeds stably but I see no reason to push it futher currently. The ram isn't stable higher in ati tool.

Would you be able to mod a bios to run 775/1000 for me? Perhaps 1000 will be stable via bios OC. Temps not an issue I load at less than 55C at these clocks after playing crysis for hours at 1680x1050 reso with everything set to very high except shaders which are only on high.

[seeker_moc]

Hello Seeker Moc
Although I don't own a dell I do own a 4670 Would you be able to mod a 4670 bios for me. I run 775mhz on core and 985.5mhz on mem during games using rivatuner. The core can reach higher speeds stably but I see no reason to push it futher currently. The ram isn't stable higher in ati tool.

Would you be able to mod a bios to run 775/1000 for me? Perhaps 1000 will be stable via bios OC. Temps not an issue I load at less than 55C at these clocks after playing crysis for hours at 1680x1050 reso with everything set to very high except shaders which are only on high.

Is the C90 a MXM, or just a regular GPU? I can try, but the tool I use only works for certain BIOSes, and I don't think that ASUS is one of them. I'll take a look and see if I can find a tool that works. Also, C90P or C90S??

[superkid.net]

hey seeker_moc i just flashed with ur 800/1050 mod bios and played 1hr COD-MW2 and the temps went upto 79C. Do you think it is fine bcause the earlier 775/1000 were around 77C(But i get a 4FPS increase using 800 over the 775!!).

[King of Interns]

It is a Asus C90P. Uses any unlocked mxm 2.1 II card as does the C90S. The vbios is on the card itself. I have looked at flashing it myself with RBE but there are so many different tables I wouldn't know which ones to change. For example there are clock info's 00-15. Tables 00,03,11 and 12 are 675/800 at 1.2V while the others are a range of lower clock speeds that I assume are the idling/throttling clocks? I think 00 is boot up clocks but as for the other three I don't know.

Are your dell cards vbios part of the system bios? If so then it is probably easier for me to flash mine as it is separate (even though I currently have no idea how properly). I have flashing my system bios though several times so I am not totally new to it.

Btw superkid I think you will find your 4fps increase is down to the fact your memory was increased my 50mhz rather than your core by 25mhz. OCing memory on 128bit cards exponentially increases performance as it allows the choked GPU to process that much more data.

[superkid.net]

Btw superkid I think you will find your 4fps increase is down to the fact your memory was increased my 50mhz rather than your core by 25mhz. OCing memory on 128bit cards exponentially increases performance as it allows the choked GPU to process that much more data.

Oh..! thanks for the info king... So do you think it is fine to run the core and memory at 800/1050 in the long run?? or should i revert back??

[seeker_moc]

hey seeker_moc i just flashed with ur 800/1050 mod bios and played 1hr COD-MW2 and the temps went upto 79C. Do you think it is fine bcause the earlier 775/1000 were around 77C(But i get a 4FPS increase using 800 over the 775!!).

79C is fine. Mobile parts are made to run up to at least 100C. As long as you're not constantly over 80C, or peak over 90C (which you shouldn't as it will throttle first), you should be fine. However, you could always go back to the lower clocks if it makes you more comfortable.

An easy way to reduce temps is ensure that your heatsink / fan assembly is clean, and removing the dust filter under the fan intake. The dust filter restricts airflow more than dust, and you should clean your fan out with compressed air on a monthly basis anyway, so removing it isn't a big deal. If you want to go even lower, try upgrading the thermal paste to AS5 or something similar.

[seeker_moc]

Are your dell cards vbios part of the system bios? If so then it is probably easier for me to flash mine as it is separate (even though I currently have no idea how properly). I have flashing my system bios though several times so I am not totally new to it.

Yeah, the Dell has it on the system BIOS, so you first have to unpack the BIOS into its individual modules, then edit the vBIOS, then re-pack it.

For you, since you already know how to use RBE, it should be real easy. It lists 16 different values because those are all the possibilities for the card to choose from, depending on load, temperature, and whether you're on battery or wall power.

What you should do is OC 00, 03, 11, and 12, like you guessed, and leave everything else alone.

Also, you're right, up to a point OCing the vRAM does more for speed than OCing the CPU clock does. Though the vRAM starts to artifact very soon after exceeding 1100MHz (for me at least).

[King of Interns]

You are lucky to get it that high! 1000mhz for me artifacts like crazy (software OC) anyways. Perhaps though a bios OC then software OC on top will be more stable...

I also have ATIwinflash. Do you recommend me to use that or to do it the hard way at startup?

[superkid.net]

79C is fine. Mobile parts are made to run up to at least 100C. As long as you're not constantly over 80C, or peak over 90C (which you shouldn't as it will throttle first), you should be fine. However, you could always go back to the lower clocks if it makes you more comfortable.

An easy way to reduce temps is ensure that your heatsink / fan assembly is clean, and removing the dust filter under the fan intake. The dust filter restricts airflow more than dust, and you should clean your fan out with compressed air on a monthly basis anyway, so removing it isn't a big deal. If you want to go even lower, try upgrading the thermal paste to AS5 or something similar.

thanks for the info seeker, i think i'll stay with the present 800/1050 clocks and one more thing that bothers me is the idle temp. Its always above 52C. So cleaning the dust filter could fix it?? and btw my 3dmark 06 went up to 8996!!