8800GT bios for better overclocking! test

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11-16-2007, 02:43 PM
georgesod

It's working for me 2. Before i could bench up to 740 and now 782 or so with default aircooling
11-16-2007, 04:12 PM
cefurkan

Quote:

Originally Posted by georgesod

It's working for me 2. Before i could bench up to 740 and now 782 or so with default aircooling

which company card do u have

gigabyte
evga
zotac ?

also when i modded my flash 1.05 to 1.1

i got increase at stable clocks 25 mhz gpu

currently using @

720/1728/999

now with latest driver trying

720/1782/999
seems to be stable

before flashing my bios

it was max stable

@695/1670
11-16-2007, 04:26 PM
ziddey

Probably a bad idea to do unless you have a recovery plan in mind. I'd be tempted to try this out, but I don't have a 8800gt and haven't looked at the card to see how the vids get applied (like on the 7900gt's etc)

But I did notice that position 0xBFD1 changes by 5 with each increase in vid. For instance, vid0 is 5f, 1 is 64, 2 is 69, 3 is 6e. Unknown of the hardware aspect, but just looking at this, if anyone wanted to try, the next value up would be 73.

And if you look in the voltage table editor, although you only have the option to go up to 4, you see in the hex that there's blank space for more to fit in. if you change this in the hex editor to also add in another vid (looks like after the 03, it'd go 00 00 73 04. Also the 04 in red at the beginning would change to a 05.

http://img257.imageshack.us/img257/7...ablevr9.th.jpg
http://img525.imageshack.us/img525/5567/hexqg2.th.jpg

completely at your own risk of course :p if it does, you'd be at 1.15v
11-16-2007, 04:57 PM
F@32

Quote:

Originally Posted by ziddey

Probably a bad idea to do unless you have a recovery plan in mind. I'd be tempted to try this out, but I don't have a 8800gt and haven't looked at the card to see how the vids get applied (like on the 7900gt's etc)

But I did notice that position 0xBFD1 changes by 5 with each increase in vid. For instance, vid0 is 5f, 1 is 64, 2 is 69, 3 is 6e. Unknown of the hardware aspect, but just looking at this, if anyone wanted to try, the next value up would be 73.

And if you look in the voltage table editor, although you only have the option to go up to 4, you see in the hex that there's blank space for more to fit in. if you change this in the hex editor to also add in another vid (looks like after the 03, it'd go 00 00 73 04. Also the 04 in red at the beginning would change to a 05.

I will wait for the brave souls and those with free 8800GT :D Call me chikn hehe
11-16-2007, 06:05 PM
Hazaro

Quote:

Originally Posted by ziddey

Probably a bad idea to do unless you have a recovery plan in mind.
And if you look in the voltage table editor, although you only have the option to go up to 4, you see in the hex that there's blank space for more to fit in. if you change this in the hex editor to also add in another vid (looks like after the 03, it'd go 00 00 73 04. Also the 04 in red at the beginning would change to a 05.

completely at your own risk of course :p if it does, you'd be at 1.15v

This makes me feel that doing a hardmod is safer LOL
11-16-2007, 08:20 PM
jason4207

Who wants to be a guinea pig?

Or who has the knowledge to know whether this might work or not?
11-16-2007, 08:24 PM
praesto

Goodness, you guys can't settle with the 1,1v bios mod? :P
11-16-2007, 08:58 PM
deathman20

Quote:

Originally Posted by praesto

Goodness, you guys can't settle with the 1,1v bios mod? :P

I'd go for a 1.2V mod without a hardmod.
11-16-2007, 11:34 PM
shaolin95

For the record I finally did the 1.1 mod (thanks Jason, Fr3ak and everyone else) and it extremely easy. I created the boot cd with NERO and then went to the Folder where I have placed the required files (C:\video) and flashed from there. No floppy needed! :-)
Core went from 725 to 771(real) and shader went from 1753 to 1868. I just need some better cooling and I may be hitting higher.
11-17-2007, 02:29 AM
BulldogPO

Can somebody save BFG´s 8800 GT 512MB OC standard bios?
Cos I cant get nibitor to work with Vista X64.
11-17-2007, 02:39 AM
flopper

Quote:

Originally Posted by praesto

Goodness, you guys can't settle with the 1,1v bios mod? :P

xtremesystems.

besides, the card got potential to be used.
hard modd is most likely the way to go.
11-17-2007, 02:53 AM
BulldogPO

Nah, I foud it allready from mkvtech.
11-17-2007, 03:03 AM
r4st4m4n

Bios mod worked for me too.

Before bios mod, AT reported error anything above 702 for the core and 1674 for the sahders.
After the mod I can go up to 720 and 1836. But at 1836, At don't detect any error but I can clearly lots of yellow dots so I'm settling at 1782.

Now when I put both core and shaders at their maximum 720/1782, I got some very rare yellow dots. Seems to be ok at 720/1728.

Am I hurting the hardware when I see yellow dots ?

Anyway I'm going to test the stability with Crysis and if I don't have any artifact at this speed I'll be happy like that.
11-17-2007, 03:09 AM
cefurkan

Quote:

Originally Posted by deathman20

I'd go for a 1.2V mod without a hardmod.

same here
11-17-2007, 05:29 AM
F@32

Quote:

Originally Posted by jason4207

Who wants to be a guinea pig?

Or who has the knowledge to know whether this might work or not?

I want to hear what Mavke thinks...

At XS it is never fast enough :D I have a feeling I might be going for hard mod...
11-17-2007, 07:44 AM
praesto

Forgive me father, for I have sinned. I forgot to measure max stable core overclock before the mod. With the mod, It seems to be stable at 756 core and 1782 shader. The shader could handle 1678 before. I've been running ati tool 35 minutes with shader and core clocks seperately and then with both overclocks at the same time. I still haven't figured whether the memory clock gained any stability from the increased voltage. Afaik, the benchies crashed at 950 memory, after realizing that, I simply downclocked to stock memory speed. So I don't have any high hopes for the memory.

I have gained 13% increase in the Crysis gpu benchmark from my core/shader overclocking.
11-17-2007, 09:49 AM
cefurkan

well with mod
my current stable mhz is

720/1728/999

totaly stable

but i want to go further without hardware mod :(
11-17-2007, 12:06 PM
Hazaro

I hope my card is special, I can do 713/1728/999 stable (60 trucks and 3 nukes blowing up simultaneously in Crysis, along with 150 mins ATiTool stable [No errors] with no voltmod.

:P

I have forsaken BIOSmod, and moving onto hardmod, good luck with raising up the BIOS volts guys!
11-17-2007, 02:55 PM
Elfear

Just tried flashing with 1.1V set in Extra box and the card artifacted like crazy at my previous stable clocks (775/1890/1900). Flashed back to stock bios and all is well again. Kinda weird that I would get less volts by using 1.1V.
11-17-2007, 07:35 PM
Renegade5399

I'll be a SOB, it worked. 735/1620/2016 pre-flash. 740/1782/2016 post-flash. Not too much of a gain, but pre-flash would give me the "Display adapter not responding" error while benching sometimes. Now, with post-flash settings, all benches run clean and smooth. This is with a Palit 8800GT (non 3 phase version). Hard mod is next, just need a damned magnifier. This card has some serious potential.
11-18-2007, 04:07 AM
sobol

FYI, I've used NiBTor voltage editor to pump up the voltage to 1.4v.
Flashed the card, and done some benching at 786/1890/1060
http://service.futuremark.com/compare?3dm06=3800648
Just to add it wasn't stable but allowed me to run 3Dmark06 artefacts free.
11-18-2007, 04:42 AM
r4st4m4n

Quote:

Originally Posted by sobol

FYI, I've used NiBTor voltage editor to pump up the voltage to 1.4v.
Flashed the card, and done some benching at 786/1890/1060
http://service.futuremark.com/compare?3dm06=3800648
Just to add it wasn't stable but allowed me to run 3Dmark06 artefacts free.

Can you explain how you do that ?

According to people who tried and measured the Vcore there was no change pass 1.1V and also according to the author of nibitor you cannot change the Vcore to more than 1.1V through his software :confused:

Quote:

Originally Posted by Mavke

Nice copy/paste guys... It seems you are all well following the thread on MVKTech but don't really discuss it there but rather here. To make it clear to every one, every BIOS you can add/change the voltage table but it depends if the voltage circuitry can work and recognize the different VID levels. And yes all turns around the VID level not the label you put next to it in NiBiTor.

So if VID 00 would give 1.00V, and you would use NiBiTor to change the label of VID 00 from 1.00V to 1.20V that will make no change at all as the VID is still 00 and that is what the card looks at not the label next to it. On the GeForce 8800 GT, the VID 00 is 0.95V and highest VID 03 is 1.10V. So you can do what you want but none of the VID's 00 to 03 will give 1.20V. But maybe VID 04...if possible and if the card can work with it.

Quote:

Originally Posted by Mavke

Yes, and it is not capped. The voltage circuitry on NVIDIA based graphics card only looks at the VID xx (the label 1.1V or 0.95V is just for you guys ti understand what each VID give sin terms of voltage). The card just looks at VID xx, and for the GeForce 8800 GT, the VID 00 is 0.95V, so having set the core at VID 00 the GPU voltage circuitry will recognize VID 00 and run at 0.95V. And VID 03 is just 1.1V... So if there would be a VID 04 then maybe we could get 1.15V...

And if you check in the 8800 GT vmod thread in the Xtreme GraphX Vmods subforum, there is an OVP on the 8800 GT that kicks in at 1.3V ...

Did you measure the Vcore with a DMM ?
11-18-2007, 05:29 AM
sobol

Thing is that I've left my multimeter back in home and couldn't measure. Guess I've done it on 1.1v :) , sorry for confusion.

Quote:

Originally Posted by r4st4m4n

Can you explain how you do that ?

According to people who tried and measured the Vcore there was no change pass 1.1V and also according to the author of nibitor you cannot change the Vcore to more than 1.1V through his software :confused:

And if you check in the 8800 GT vmod thread in the Xtreme GraphX Vmods subforum, there is an OVP on the 8800 GT that kicks in at 1.3V ...

Did you measure the Vcore with a DMM ?
11-18-2007, 07:04 AM
r4st4m4n

Quote:

Originally Posted by sobol

Thing is that I've left my multimeter back in home and couldn't measure. Guess I've done it on 1.1v :) , sorry for confusion.

Too bad ... I was hoping for an easy solution to go over 1.1V since my soldering skills are not very good :p:
11-18-2007, 08:02 AM
Renegade5399

Well now after some additional tweaking I am now at 756/1836/2016. Quite a nice little bump in performance for just a BIOS flash.

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8800GT bios for better overclocking! *test*

8800GT bios for better overclocking! test