found a way to GREATLY improve FPS stability with VERY LOW TEMPS 7811fx/7805u users only

before I screwed up my laptop by changing the device ID of my 9800M GTS video card I found out something really great about voltmodding the 9800M (luckily after 2 weeks I was

able to resuscitate my laptop from the grave and applied thi mod again, but doing it right this time.

I basically used Nibitor 5.2 and modified the voltage value of the 9800M.

the entry that regulates the voltage value for when the video card is in "3D Extra mode" (full GPU/memory clock) is by default 1.12V for the 7805u (1.11V for the 7811FX)

I changed that value to 0.9V.

this causes two main things: the GPU consumes less when in "3D Extra mode" which also makes it get less hot than it does in 1.12V (or 1.11V on the 7811FX)

the only consecuence to this is that you won't be able to overclock the GPU that much as you used to, because there isn't enough power to sustain the clock.
therefore the system will crash.

you can still overclock the memory since it's driven by its own voltage. my 9800M can hold a memory overclock of more than 950MHZ without crashing (with and without this mod).

Since I don't like to overclock laptops, I am being modest and keep the overclock to only 850MHZ vs its 800MHZ stock freq.

what are the benefits of this mod?

low temperatures at full GPU clock speed.

personally I have played for 1 hour Asassin's Creed and the GPU temperature reported only 58 degrees celcius.

what is most impressive is that the GPU's fan NEVER kicked in into high speed making all that noise that is kind of annoying.

I played Need for Speed Shift for about 30 minutes and same result here. the GPU fan never kicked in into high speed and the temperature reported was of 59 degrees celcius.

not even 60

what impressed me the most though was something that I figured out almost immediately after flashing the video card.

FPS (only when playing games) seemed to be more fluent, I don't mean increase in FPS and here is the shocking difference, I was able to play Assasin's creed at max resolution

and high settings at around 30 - 42 FPS

after the flash mod I have been able to play more to the 35 - 45 FPS so not really an increase in FPS but more of a fluidity of image.

before fraps was still reporting 30 FPS but the whole game experince was kind of choppy and stuttering. now with the lower volt mod it all seems more smooth and fluid.
same thing for Need for Speed Shift.

the reason I noticed this is because I used to play certain scenes with and without the mod and the difference was evident. for example when you start with Assassin's creed

into the room where the level starts, before if I would move around the FPS would be at 25 -28 and the gameplay would be choppy, now it is at 28 -30 FPS and the gameplay it is

much smoother. you can totally tell the difference.

before this mod my GPU's temperature used to hit 69 degrees celcius under full load and with fan at high speed. now after the mod only 58 with medium speed fan. that is

impressive

so for anyone of you that think this mod is worth a try I am posting two files here.

the bios mod for the 7811fx and 7805u fx laptops.

all you have to do is download the right video bios that belongs to your laptop and flash it under dos by creating a bootable USB flash drive or a bootable floppy disk with

the nvflash utility and video bios in it.



ABSOLUTELY DO NOT DO THIS MOD IF YOU FEEL UNSURE ABOUT IT AND ABOUT ALL THAT I HAVE MENTIONED ABOVE. I WILL NOT FEEL RESPONSIBLE IF YOU ENDUP WITH A DEAD LAPTOP.

with this said, the command line is simple, once you booted up your system under DOS type the following to backup your current video bios:

nvflash.exe -b backup.rom (it's important you have a backup of your own video bios)

then type the following to start flashing:

nvflash.exe -4 -5 -6 "name of the bios here.rom" (example 7811.rom or 7805U.rom).

press "y" to confirm the warning messages and start flashing.
wait until you get a "successful flash" message then reboot.

do not flash it in any other way or you might corrupt your system.


Please feel free to post your comments about it you try the mod.

Happy Flashing

 

Thanks a lot for that detailed info mate... Great job...

 

Whats the max GPU OC now? Right now I run stable @715mhz (gaming) and benching with 750mhz. Memory is 950mhz when gaming.

 

Im getting a black screen in games without lowering the clocks in ntunes and its getting really old fast since i cant seem to find a way to make it save the settings. Moreover even with clocks around 300/500 ive hit +90C on my gpu so lowering the voltages might be the only way to make my 7811 not fry itself on the next ocasion...

The problem is that Ive been trying to flash my gpu for a few hours now and I cant seem to find a way around 'EEPROM not found' error.
The check command in nvflash returns 'EEPROM ID (20,00FF): unknown' and I am unable to make a backup of my bios or flash anything.
Gonna try installing XP to flash directly under Nibitor but not getting my hopes up.

Any ideas how to solve this problem?

 

same issues here. I tried the newest version of nvflash that I could find (5.88) and it still didnt work. What bios do you have osore?

 

I have had the same problem with an external 9800 GT 1024mb.

nvflash did not see the video card at all. so I tried the tweezers mode.

basically you have to physically short two pins in the video bios chip. that worked with the desktop video card but it might be tricky to do on a laptop's coard. it means you might have to take apart your laptop.

the way that the tweezers mode woks is that once you found the video bios you short the two pins and then power up the system once the pc bootes up in DOS you remove the tweezers from the video bios and then nvflash should be able to recognize your adapter and flash it with no problems.

another easier way arounf this would be if I would incorporate the video bios into the system bios, then all you'd have to do would be to flas the system bios either from dos or windows and that way you'd be able to update the video card's bios as well.

if you know how to do it you could do this with phoenix bios editor. or I could do it for you for it won't be until tonight. I'm on my way to work now.

BTW, what laptop do you have? 7811fx 0r 7805u?

it's important that this distinction is made otherwise you could brick your laptop 100%.

bye

 

Hey ONE_J, thanks for the answer.
Its an 7811fx.
The tweezers mode sounds pretty complicated with a lappy, doing it through the system bios sounds doable i guess.
If you could give me a hand with this I would be very grateful.

@custom90gt the mb bios version is 9C.08, no idea about the gpu tho.

 

Will test if stability is true....

EDIT:

0.0 *Jaw drops*

1440x900 HDR benchmark 16x multisample 50fps with the same clocks 700/925/1825 1.00v instead of 30fps @ 1.12v Standard ? *tests 3Dmark06*

EDIT2:

Weird, brought it down to 0.9v, same gpu clocks, +10fps in the saboteur, +5fps on the crysis benchmark, +30FPS on RTHDRIB but the same 3Dmark score.... Very strange, but even in 3Dmark, the places where it would normally studder and be choppy were now very smooth and fluid. I'm beginning to think this card needs less voltage rather than more voltage.

 

???

 

It seems that the 9800gts needs less voltage for more solid performance.
Very weird.

 

Okay, that IS weird! But it seems that moding that 9800M GTS bios isnt that straight forward in P7811-fx laptop

 

I know that it states that its for "7805/7811 only" but is it possible to complete a similiar undervolt on my 8800M in my 6860FX? Sounds like a great tweak that would help my random stutters sometimes in games

 

How do you do this? Create a bootable USB and stuff. Your guide is kinda vague.

 

My card won't run 3dmark at 0.9

Can you make a bios with 1.0v pls?

 

It won't even run at 1.0 damnit

won't run at 1.05. This is not worth doing.

 

that's exactly what my point was. I know it seems absourd, but the system is much more stable this way and what I love about it the most are the temp never going over 59 at full speed. oh... and that fan at medium speed
now, very awesome!

 

I don't have a 6860fx. so I don't know.
I would take it easy though, what's working for some seems not to work for others.

you can find out more if you download GPUZ and dump a BIOS of your 8800M and check it with Nibitor 5.2. if there is an option under the "3D Extra" entry lo go lower, give it a shot but don't take my word for final sentence.

because you are having a negative experience with this mod it doesn't mean that it's not worth for other gateway FX laptops users.
very sorry dude

 

Are you OC'ing or running at stock? Keep in mind that most hardware is manufactured the same but does not always run the same over the most miniscule things

 

There should be no difference, my undervolting guide is a general undervolting guide.

http://forum.notebookreview.com/showthread.php?t=439488

Just make sure of your index, do nvflash --list to make sure youre flashing the right adapter, and you might have to add extra overrides like -4 -5 -6

Its quite simple and only takes 10minutes really

 

So you think I could perform the same task llynx, assuming I dont try to lower anything too much and be smart about it?

 

@ONE_J Its the stock Vista64 that comes with 7811fx.

 

We need more people to try this. It is safe.

 

You got it working normal again, mew?

 

1.08 now, not much difference that I can notice.

 

You mean regarding FPS or temp? And hows the OC now?

 

Slightly cooler temps but it reaches the same max. Haven't tried OCing yet. I might try 1.06. Fps is the same.

 

mew1838, what forceware drivers and OS platform are you using?

 

so what two pins do you have to short to get this to work? I really would like to try this.

 

this is the reference I used to ground the pins on my 9800 GT (desktop card) when it was not recognized anymore by nvflash:

http://bitboard.blogspot.com/2009/05/dead-nvidia-8600m-gt-gpu-vbios-flash.html

I would be careful in doing this on a laptop though. I am working on modding windows 32 bit and 64 bit executables. of course I will try first on my laptop to assure that it's working (only the 7805u though, cause that's the laptop I own, all 7811fx users must do it at their own risk).

though, the way that you procede on grounding the pins of your video bios is to first of course you have to find the video bios in the board then, I wouldn't use the tweezers (although the mod is called this way), sounded to me too cumbersome.

it was much easier to me to use one of those thin metal strnigs that are used to wrap all kinds of cables. for example is you buy a mouse, keyboard, joystick, home theater system and so on... you could use one of those thin metal strings that are wrapped around the cables. tha's what I used.

you just expose both endings by cutting them with a pair of scissors, then you shape it as a U letter and place it in between your thumb and point finger then with the power off you grond the pins then power the system on.

you remove the metal string only after the system has booted into DOS, then proceed the usual way with nvflash.exe

hope this is helpful

 

I modded the 9c.17 executables for windows platforms but they did not work.
the mod was completely bypassed.

so I think the only way to this now is in DOS.

 

sorry for posting several times in a row.

ok, for those who wanted it I now have a bios to be flashed in DOS.

it's a bios.wph modded image only for 7811fx users though, since I assume that for 7805u users the nvflash procedure was enough.

send me your emails and I'll send that to you

bye for now

 

what are you using to mod the bios?
I dont really feel like taking my laptop apart again to try the pin method.

 

yeah I would like this, can you send it to me thanks

 

@ONE_J I would appreciate it very much if you could send it to $%#&[at]gmail.com
thanks very much :]

 

I'm using 186.82 and win 7

 

Have just tried to flash my lappy ^^.
I must change voltage to 0.98 since 0.9 is not enough for my lappy. I've got black screen randomly when playing game (COD:MW2), but not since change to 0.98 (for extra profile only ^^)

Edit: Almost forgot, Man, it's cooler ^^, I'm not sure about smoother, but It's cool

 

Anyone successfully flashed their P7811-FX? And did you managed to make backup of you old bios and how?

 

Will it work on my laptop (P-7801u)?

(I guess it will, since it's almost identical to the 7805u but with a different screen. I'm just asking because I'm a little afraid of flashing the bios so just wanted to be sure)

What do you recommend me, this guide or Ilynx's?

 

hi,

Ilynx's guide is probably more accurate in terms of step by step procedures, this one just has a little bit more of detail on why you should or you shouldn't do it.

my guess is sure, give it a try. do you own a 9800M GTS as well?

just remeber that if you grab any of the bioses that I have provided you have to be aware that the 7811fx bios has a different devide ID because it has 512MB, the 7805u has 1024MB so if your card has 1024MB grab the 7805u bios, though, I strongly recommend to dump your own and modify it.

what you can do is dump the video bios with nvflash.exe or with GPUZ (you can google it) then open the bios with nibitor 5.2 and play with the votages, first see what the default volatge table gives you as options, then try those first, if it doesn't go well then try the advanced voltage table selector where you can edit your own volt values. you might be luckier with slightly higher values than those that I have provided in the attachments of the first page.

I am currently trying to set lower volt values also for the 2D, Thrtl and 3D entries. I want to see if I can set it to 0.8V instead of 0.9 in order to keep the GPU even cooler in windows desktop.

I'll report my experience

 

**************VERY IMPORTANT, READ THIS******************

After a few people have reported to me saying they wcrewed up their laptops after they have changed their video card's Device ID, it is now necessary to me say: DO NOT EVER CHANGE THE "DEVICE ID" OF YOUR LAPTOP'S VIDEO CARD.

it works with desktop video cards but it is definitely FATAL for a laptop.


PLEASE PLEASE PLEASE.

the mod posted in this thread is a good one (for certain people, me included) only if you don't start messing on your own.

it's funny how the first thing I wrote in this thead http://forum.notebookreview.com/showthread.php?t=439999

is that I screwed up my laptop by changing the device ID of the 9800M GTS, and people just keep ignoring it.

I am being helpful handing out a crisis recovery BIOS package that works with the 78xx fx series but: I WILL NOT ANYMORE IF THIS IS THE CASE HERE.

trust me, there is no such thing as: "it didn't work on his laptop but it might work on mine cause I'm lucky...bla bla bla..."

it simply doesn't work for any laptop, unless you find a way to do it via software.

so please stop ignoring the warnings

thanks,

 

Wow, what an experience, I'll never try to do that again ^^.
Thank you ONE_J, i thought my lappy has gone, but thanks to you, she still alive.
I've tried to changed the device ID, and it started a mess, don't do it until you want to laugh out loud when you see Gateway's logo on your screen.

Phew, It's too late now, I'll goto sleep now, what a night! ^^

 

Ok I am ready to fight. I used GpuZ to save my BIOS. I took NibiTor to edit the bios. i undervolted my card and changed clocks. Now I am ready to flash. God bless me and my card.

 

God. I can`t enter DOS mode.

 

boot from usb....

 

How? I tried with windows 98 files but it doesnt work
i formatted USB stick as FAT
wth?
HELP!

 

http://forum.notebookreview.com/showthread.php?t=246530

 

I just did this on my P-7805U and it was really esay and it helped quite alot

I used Furmark 1.7.0 for the test, fullscreen 1440x900

Old bios: 1897 o3Marks - Max GPU temp: 81 C

New bios: 1909 o3Marks - Max GPU temp: 71 C

So my score went up and temp went dooown ;D Nicely done mate!
Therefor i give you this:

http://www.youtube.com/watch?v=Y6ljFaKRTrI yay

Edit: im on a windows 7 64 bit retail if you wonder about that

-hapse

 

It works for me at 1.0v now. I realized my mistake was adding new voltage VIDs.

 

nice!
I'm glad it worked for you too

so, how are your temps now? did they drop a bit?

 

so, my experience so far...

I have modded the video bios further by applying 0.85V and 0.8V and, it simply didn't work for me.

the system didn't crash but somehow it looked like if the voltages got completely bypassed in windows and defaulted to 1.12V cause when I was playing Assassin's Creed, the GPU fan started to kick in very fast and loud again, so I decided to quit the session and go check the temps and they were back to 69 and choppiness btw came back.

so I decided to stick with 0.9V for my laptop and my guess is that enything above that range should still do it.

so if the 0.9V did not work for some, then you should try the advanced voltages tab in nibitor and perhaps select 0.95V or 1.0V. try to still keep it lower than the stock 1.12V. that would be great.