View Full Version : BFG 6800GT biod mod
bobmanfoo
08-15-04, 03:06 AM
i modded my bfg gt bios with OmniExtremeEdit v1.2, changed the gpu voltage to 1.4V, set 3d default clocks at 410/1.1. Max OC increased from 415/1.15 to 425/1.18, temps rose 3C idle and load
Do at your own risk, do not flash if you are not familiar or confortable with it
You have a copy of it? I have the same card in my rig and would like to give it a try.
bobmanfoo
08-15-04, 10:20 AM
sure thing my friend ----- nvflash -p -u -f bfggt14oc.rom ------ im currently using Expertool to have the fan at 100% speed a 2d and 3d to make up for the extra heat
My water block should be here tomorrow. I'll wait till then. It should have been here on Friday but that damn hurricaine held everything up. Still not sure if I have to work tomorrow, the place looks like a demilitarized war zone down town.
bobmanfoo
08-15-04, 03:57 PM
BFG 6800GT bios - 1.4V, 425/1.12 clock speeds - close to BFG Ultra OC clocks
mattspalace
08-15-04, 04:01 PM
What's stock voltage for a 6800 GT?
bobmanfoo
08-15-04, 04:33 PM
1.3v
mattspalace
08-15-04, 04:42 PM
Ah, what I thought, wasn't sure though. Is she stable?
PCGUY112887
08-15-04, 05:18 PM
Try 1.5v!!!
Can you change the memory volts?
bobmanfoo, what kind of cooling are you running?
bobmanfoo
08-15-04, 07:14 PM
im using the stock cooling, im not going to try 1.5V on with the stock hsf, and at 1.4V(Ultra stock voltaage) it is solid
Cool deal, with the water block I should be good to go. I would run it on the stock also, but no sense seeing that the block should be here tomorrow anyhow, if fedex is running. Half of florida is in a shambles.
mattspalace
08-15-04, 07:22 PM
I think I'll test it out also.. Can you give a brief step-by-step as I've never used NvFlash before. Thanks.
Blah, nevermind.. There's a sticky for it! :p
Can I do this right from a dos prompt or do I need to use a boot disk?
I just tried putting those three files on a boot disk and ran the nvflash -p -u -f bfggt14oc.rom and it said cannot open file.
Big Lar
08-15-04, 09:34 PM
Try nvflash -p -u -2 with the name of the rom file right after with 1 space,ie;
nvflash -p -u -2 larrys.rom (not larrys rom of course).
You will need cwsdpmi.exe in with the .rom file and the nvflash.exe file on the boot disc too, if you are flashing from dos.
I flashed with a Leadtek bios that I got off hardforum today, which changes the voltage only in 2d/3d to 1.4v and not the clock speed. Works very well. :)
Flash at your own risk of course!
bobmanfoo
08-15-04, 09:50 PM
you need a boot disk, cwsdpmi.exe needs to be there as well, if not you need to add a file for dos compatiblity
heyheyhey
08-15-04, 10:05 PM
Only Ultra BIOS's can do 1.5v, which is what I'm currently running.
I also get an error that it cant run cwsdpmi.exe
I will write it down when I run it this next time.
McDongle
08-15-04, 10:18 PM
That's nice....the same information I put you on to three days ago bobmanfoo ...glad it worked.
McDongle
08-15-04, 10:25 PM
Nandro make a bootdisk using a differnet version of dos. I was getting the cwsdpmi.exe error as well using a caldera dos boot disk. I made a boot disk with windows XP. Right click on your A: drive, choose format,select create MS dos bootdisk. That should work for you.
bobmanfoo
08-15-04, 10:48 PM
That's nice....the same information I put you on to three days ago bobmanfoo ...glad it worked.
thanks!
Bobmanfoo - can you tell me exactly how you did it. Did you use a boot disk, if so what one, I think I was using Dr.Dos and its not working. It errors out on the swapfile.
bobmanfoo
08-22-04, 10:40 AM
i used a floppy the first time, made a boot disk through windows, should work. if not, i've been using boot CDs lately so i don't have to swap to ps2 keyboard, you can find how to make a boot cd at, http://www.nu2.nu/bootcd/ , scroll down to 'Bootable Dos CD-Rom (single boot image) [updated! nov 4, 2002]'. http://www.bootdisk.com/ should have everything for you to get it working. i also get a swap file error everytime i flash but it completes the flash anyway. hope this helps, let me know
I got it to work and now run it stable at 458/1173 which is a sweet jump. I am sure the water cooling helped as the temp hasnt changed from 41-44c range.
Could I get more using the Ultra bios? Jeesh, are OC'ers never happy?
DayUSeX
08-22-04, 01:46 PM
hm now im curious and going to give this a try sometime. I hope it works out well, and let me know how the water block tunrs our. Still what do you do about ram.
copernicus
08-22-04, 01:52 PM
hm now im curious and going to give this a try sometime. I hope it works out well, and let me know how the water block tunrs our. Still what do you do about ram.
the mem timing's are adjustable on my fx bios. so i'd imagine the more 6800 bios he has to work with the odd's of getting mem adjustment for 6800's on future versions of the editor will be better.
so everybody with a 6800 help us all out by uploading your bios to mavke.
http://www.mvktech.net/upload.php
The water block covers the ram also. I'm sure it does something even though people say the gddr3 dosent get hot, because before I put the block on my mem oc's were very low. I do admit that there was very little air movement in the case because everything is water cooled. I was just playing D3 at 12x12 at Ultra setting, 4xAA 8x AF and with vsync on it was almost always at 60 if not it locked in at 30 and was totally playable. I am waiting for the new riva tuner to come out and then get a WB for my NU to see how it fares.
Where did you get experttool to keep the fans running 100%? I can't find that anywhere to get.
I used your bios upgrade and it worked. Not sure how to verify the voltage went up since I don't know where to look. But its running and I still can't seem to break 52k in Aquamark. Going to run 3dmark03 right now to see if it noticed a difference.
Where did you get experttool to keep the fans running 100%? I can't find that anywhere to get.
I used your bios upgrade and it worked. Not sure how to verify the voltage went up since I don't know where to look. But its running and I still can't seem to break 52k in Aquamark. Going to run 3dmark03 right now to see if it noticed a difference.
Okay your bios mod screwed up my video card now to the point where it just locks up the machine. It never did this before.
Can someone please tell me how I can get my card back to its stock bios? Or if someone has a copy of the stock bios flash I would apperciate it.
I need HELP ASAP!
BFG 6800 GT stock NVFLASH please!
DO NOT DO THIS MOD!!!! It will make your card unstable and if you try and flash back to original bios, it becomes a paperweight!
bobmanfoo
08-22-04, 03:31 PM
DO NOT DO THIS MOD!!!! It will make your card unstable and if you try and flash back to original bios, it becomes a paperweight!
don't jump to conclusions. which bios did you use, what are the default speeds? did you make sure your card could handle those speeds? heres the stock bios
copernicus
08-22-04, 03:35 PM
DO NOT DO THIS MOD!!!! It will make your card unstable and if you try and flash back to original bios, it becomes a paperweight!
Okay your bios mod screwed up my video card now to the point where it just locks up the machine. It never did this before. Can someone please tell me how I can get my card back to its stock bios? Or if someone has a copy of the stock bios flash I would apperciate it.
I need HELP ASAP!
BFG 6800 GT stock NVFLASH please!
ok first, did you backup your card's original bios and use that to mod?
or did you flash with someone else's bios?
when you tried to flash back what bios did you use? your own bkup or one you dld?
also what version of nvflash did you use?
i've heard some people have prob's flashing back but those were all with ultra bios. i've done the mod on my own bios and it's problem free [see sig] and i've heard other people do it without prob's. so maybe it's a card specific thing? :confused:
do you have a pci grfx card? that's the only way i know of to flash it back but it might not work without using the original bios.
hey bobmanfoo maybe you oughta edit your first post and warn peep's to try this at their own risk.
some people just wanna kill their card's if you know what i mean :rolleyes:
the mem timing's are adjustable on my fx bios. so i'd imagine the more 6800 bios he has to work with the odd's of getting mem adjustment for 6800's on future versions of the editor will be better.
so everybody with a 6800 help us all out by uploading your bios to mavke.
http://www.mvktech.net/upload.php
Thanks for that copernicus :-)
I am currently working very hard and mvktech dot.net site version 2.0 :-)
And this will have immediatly several 6800LE/NU/GT/U/UE BIOS up for download hehe. Those who have such a card pls still upload yoru BIOS's as it are still 8 days to win $25 when you submit your BIOS!
don't jump to conclusions. which bios did you use, what are the default speeds? did you make sure your card could handle those speeds? heres the stock bios
It's to late. I already returned the car. I flashed it back with the stock bios. My car was handling 413/1130 fiine till I did your bios mod and now it failed and failed all the tests I would run at it. Once I tried to go back to the stock bios, it completely died.
The bad thing is every BEst buy in town was sold out AGAIN of the GT. So I give up for now.
copernicus
08-22-04, 04:09 PM
It's to late. I already returned the car. I flashed it back with the stock bios. My car was handling 413/1130 fiine till I did your bios mod and now it failed and failed all the tests I would run at it. Once I tried to go back to the stock bios, it completely died.
:rolleyes:
bobmanfoo
08-22-04, 04:24 PM
the stock BFG bioses from mvktech does not work with NVflash, i tried on my card and it did the same thing, blank screen, your card was/is not dead so get it back if you can. it just has no bios on it, when you went to flash with nvflash, it erases the current bios, then it tries to writes, but it can't write something it can't read. as i told you before i had the EXACT same problem till i got a bios that was backd up with NVflash. i posted my original bios, why didn't you use that one? i can confirm that it works with nvflash, you will now need to flash blind or with a pci card
on a different note: my OC is now up from 425 to 450 stable! the wonders of good cooling ;) i tried with 1.5V and its a no go, locks up and very unstable
the stock BFG bioses from mvktech does not work with NVflash, i tried on my card and it did the same thing, blank screen, your card was/is not dead so get it back if you can. it just has no bios on it, when you went to flash with nvflash, it erases the current bios, then it tries to writes, but it can't write something it can't read. as i told you before i had the EXACT same problem till i got a bios that was backd up with NVflash. i posted my original bios, why didn't you use that one? i can confirm that it works with nvflash, you will now need to flash blind or with a pci card
on a different note: my OC is now up from 425 to 450 stable! the wonders of good cooling ;) i tried with 1.5V and its a no go, locks up and very unstable
Well I can't get the card back. But once I get it back, I can try a few things again this time with a backup. How do you restore the bios if it won't let you boot the machine? lol
bobmanfoo
08-22-04, 05:32 PM
How do you restore the bios if it won't let you boot the machine? lol you flash it blind or with a pci card
Here take this back, I did something I know nothing about because I read it on the internet that it would be cool... jeesh
Bobmanfoo, good deal I have been playing D3 all day with no issues. It never ceases to amaze me how people are in a hurry to try something with little or no research and then book down and return it with the same little or no research on how to fix it.
McDongle
08-22-04, 11:57 PM
I agree Nandro....obviously he didn't put much thought into what he was going to do before he did it. He was ranting on at the 3DGuru forums as well how some guy told him how to do a mod and now his card is screwed.... a little knowledge can be dangerous!!
Things like that make manufacturers try to make it harder to mod hardware. If I returned every piece I broke doing a mod, thats just not right.
Things like that make manufacturers try to make it harder to mod hardware. If I returned every piece I broke doing a mod, thats just not right.
Next time anyone does something like this, put up in there information BACK UP YOUR OLD BIOS. I did it exactly the way he said to do it. It worked, but my card became unstable. 3dmark would cause it to reboot, etc. I saw no performance increase either.
Sentential
08-23-04, 08:23 AM
Next time anyone does something like this, put up in there information BACK UP YOUR OLD BIOS. I did it exactly the way he said to do it. It worked, but my card became unstable. 3dmark would cause it to reboot, etc. I saw no performance increase either.
Dude thats why you gotta do reserch before you dive headfirst into things. Returning an already rare vcard after *you* **** it up is just plain wrong. Especially since it could have been troubleshooted.
Also everyone knows that you should back-up your origional BIOS, for that very reason. Life is imperfect, hope for the best but prepare for the worst. Did you not think for even a second what you would do if it didnt work? I for one always expect the worst so that I dont give my hopes up
Everyone here has a wall of shame, it comes with the territory. OCing isnt free, we always pay the price eventually.
As for me, ill flash my BIOS when this becomes mainstream. Im not gonna put a $400 card on the line for that last 10% it just dosnt make sense at this point. Other than benching I have no need for the power.
My 2 cents
bobmanfoo
08-23-04, 09:10 AM
Bobmanfoo, good deal I have been playing D3 all day with no issues...
good that it worked out pretty well for ya :p did you install the waterblock before or after the bios mod? i was just wondering how much better cooling/lower temps helps OCing on a stock GT. kinda sucks when you buy highend hardware and they were treated with the 'thats good enough' when designing and producing, :bang head POS stock fan. at least its off :)
stock: 415/1.15
bios mod, 85C load: 425/1.18
bios mod, 62C load: 450/1.18
Next time anyone does something like this, put up in there information BACK UP YOUR OLD BIOS. I did it exactly the way he said to do it. It worked, but my card became unstable. 3dmark would cause it to reboot, etc. I saw no performance increase either.
i feel bad for what happened to such a nice card, i never meant for this thread to be a manual or guide of any sort, fafnir and mcdongle have threads, i was just sharing my results, Nandro asked for the files so i posted them, he asked for help i tried to help. g35_tx, you asked for the stock bios, i posted it but you decided to DL one from mvktech, then you returned it before asking questions or help from someone who is familiar with or has done this mod. i had to mess around with my card for 3 full days before i got everything perfect, from a bad flash, which took 2days to fix, to adjusting every thing to my liking.
I put the WB on before I did it, knowing that the mod would up the temp. With the WB, it never goes above 48C and thats running cpu and gpu intensive stuff over a long period.
As for the following to the letter of the bios mod THERE IS A STICKY AT THE TOP OF THE PAGE.
copernicus
08-23-04, 03:06 PM
i feel bad for what happened to such a nice card, i never meant for this thread to be a manual or guide of any sort, fafnir and mcdongle have threads, i was just sharing my results, Nandro asked for the files so i posted them, he asked for help i tried to help. g35_tx, you asked for the stock bios, i posted it but you decided to DL one from mvktech, then you returned it before asking questions or help from someone who is familiar with or has done this mod. i had to mess around with my card for 3 full days before i got everything perfect, from a bad flash, which took 2days to fix, to adjusting every thing to my liking.
and as a general rule, if you post and ask someone to help you fix it, it's best to wait more than an hour or two for some help before you return it.
Where did you get experttool to keep the fans running 100%? I can't find that anywhere to get.
I think Experttool is Gainwards tweaking tool that they include with their cards..
Im gona try this flashing thing also.. Ive noticed I get lockups when at 410\1100 but not at 400\1100... no artifacts at all but just lockups.. hope some more vgpu is the key..
copernicus
08-23-04, 03:46 PM
I think Experttool is Gainwards tweaking tool that they include with their cards..
Im gona try this flashing thing also.. Ive noticed I get lockups when at 410\1100 but not at 400\1100... no artifacts at all but just lockups.. hope some more vgpu is the key..
lower temp's=less lockup's
more voltage=higher temp's
i wouldn't recommend doing this if your card run's hot, say 60+ or so.
if you do, don't go above 1.4v unless you got decent temp's.
you've read the entire thread i hope :)
bobmanfoo
08-23-04, 06:15 PM
yes, expertool is from gainward, but works with all brands, you can dl it off their site, also if you read my previous post you will see that cooling helps the OC alot, i only gained 10mhz on the core when upping from 1.3v to 1.4v, but after i chunked the factory cooling and went my own route i gained an addition 25mhz. you will not reap the FULL benefits of the mod until you lower temps
Flashing the bios, with other people's and my own moddied, allow me to o/c the card to 451/1.21, but the card was unstable even at previously safe 427/1.19. Doom3 ran w/o a hitch at the higher speeds, but no go with 3Dmark03 and Farcry. Flash back to original bios and everything is back to normal. It seems to work for some, but it did nothing for me, made it worse.
Dragonprince
08-25-04, 12:26 PM
I wouldnt mind going from 1.3v to 1.4v to get that little extra stability but anything over a 400Mhz core clock with stock cooling is taking to much risk with a 400+ dollar card for my taste....
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