I used a 1M pot but only because I ran out of 100k pots (which I reckon is the ideal value of VR) at that time, had to make do cos I couldn't be bothered walking to the nearest hardware store around 2 miles from here... :D
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I used a 1M pot but only because I ran out of 100k pots (which I reckon is the ideal value of VR) at that time, had to make do cos I couldn't be bothered walking to the nearest hardware store around 2 miles from here... :D
i used a 10k pot + a 14k fixed resistor and it looks like im at 2.84v woot!.
Crack up the memory pass the 900MHz mark...
well this got interesting. I was getting artifacts at desktop when clocking even after reducing voltage to 2.78 so i decide to rip off vmods till i do more homework. well i ripped to hard and ripped the 3rd resistor off and cant find it... :( so now my card is dead at the moment until i find the value of that resistor anyway.
Help please....
Ouch :bsod:, if you can find a resistor match you should be able to take the card into a good electrical repair shop, someone with the right tools and expert soldering skills should be able to fix it for you, if you are lucky they'll solder that resistor back on for just 10 bucks...
got lead wire already soldierd in place i have mucho cards to scavenge from tho i will prolly just use a fixed and or variable i just need to know the value of that particular resistor if possible so i have a range to work in.
Not sure how to tell the value of those tiny resistors, all I know is they are a :banana::banana::banana::banana::banana: to solder back on, just wait for one of those EE guys to turn up, they'd know... :)
just put one of your ohm meter leads on each soldiered end of it when card is off and thats it :) i already have the hard soldiering done now i just fill in the blank with appropriate value @ the ends of the wires ive attached. whew i may have dodged one here... circuit is functional
Yes but I go nuts with the hotglue gun (for good measure, see pics) after soldering the wire onto the resistors, it's all securely fixed under hotglue... :D
you read my mind, i already did that LOL :D
well im up and running but seeing some glitches! be nice to know the exact value of that resistor! :)
edit: card is running fine @ underclocked ram speeds :( cant complain at least i didnt fry it. my ram just didnt like volts at all.
Alright.. Upon reading all of the previous.. None of it sunk in. x_x
Could someone tell me in a neat little package on how to do the memory vmod on a 6800NU made by BFG? Right now I got the core at 1.5 with the bios mod and usin a NV5 for cooling, which works damned good so far.
I could probably understand it better if I read through it about 6 more times.. But im too scatterbrained right now. x-x
be very cautious with vddr mod as it didnt take much at all to make my rams act goofy. stock was 2.73 highest i went was 2.84.
So ive heard, although did it perm goofify the ram or did it clear up when you dropped the voltage down? I can get the ram up to 870 actually without artifacting, but some games just have to be bastards and throw artifacts around. Would adding voltage clear this up?
Oh, And also if the card yer talkin about is a NU card (A pic would be helpful) and ya point out where the resistor is, ill gladly give ya a readout.
more voltage definatly wouldn't hurt. I hear gddr3 dosn't like voltage too much, but I havn't tried myself nor heard of any actualy results.
Well if im not mistaken, NU cards dont have gddr3, but gddr1 or something. Would my kinda ram be sutible for this kinda mod anyway?
pump the voltage through it :) non ultras love voltage I hear, well not really, they are just given less than they need stock.
Yeah, Much less. They run at 1.2 stock. Right now I do have the core cranked to 1.5 and its overclocked to 420mhz, but the memory I can only really max out at 800-820 without any sort of artifacting. I can get it to 870, but then alot of the games start to artifact then, namely Halo with the snow and Rollercoaster Tycoon 3 showing messed up geometry, although no benches artifact.
Maybe I missed it, but are there schemetics for doin a memory vmod on an NU. (Jeeze, im so out of my mind today. Too much stress.. x-x ))
Performing the mod/s after ~20 cups of coffee is NOT recommended. :explode:
I take it you fried it?Quote:
Originally Posted by stealthbomber
LOL not me him^^^, the mods are pretty straight forward to me... ;)
This entire thread is about the voltage mods, you simply cannot miss it, unless your head is completely wasted... :DQuote:
Originally Posted by Reznik Akime
Yech, I only drank one cup of coffee in my life and I had to force myself to keep it down, much less finish the crap. It was even loaded down with sugar and cream.. Im just lacking a great deal of sleep from the last few days.
Im a night owl, but unfortunately ive been having to get up early to work with mah grandpappy. Ill take another look through the topic when my mind is fully rested which should be tomorrow. If im not mistaken, I may have a few pots layin around. If not, Ill just take em offa my old Vmodded 5600.
No, Its not dead, just obsolete. :D
-Addendum-
Alright, Im havin a very hard time following whats needed for the volt mod. I saw stuff about adding caps to the board and I just feel like im leaving something out here. Not that its not outside of my ability, I just wanna make sure as to what all I will need to do this mod, although I dont plan on adding the extra molex. Tomorrow im gonna make one of my treks into town for once (Its about a 20 mile drive, I live out in the boonies of Texas) and I wanna go ahead and stop by RadioShack to get all I need. I dont wanna have to waste gas on multiple trips.
i've edited a bit the first post, enjoy ;)
Thank you! Good thing im at my wits today. :D
I got the caps from an assortment pack that Radio Shack had, Although the 3300's I have are rated for 25v.. It this still usable for the ddr cap mod? Also can I get a part number on the 100k risistor. All I have are the 10k-15 turn ones, or is there a topic around here that sports all the part numbers one needs for volt mods and such? That would be quite handy.. I may scrounge one up later if I have the time.
Thats exactly what I did, works fine.Quote:
Originally Posted by Reznik Akime
This may sound a bit silleh.. But.. Is there a certian way you have to solder the caps to the board to make it work right? Like is there a negative and positive to the cap? If so, Which one leads to the ground? I can see markings on the cap that I assume indicate which way the flow of the electricity goes, but theres one thats just got dashes and no arrows on it..
The polarity of the caps are always marked, get the polarity wrong it may :explode:
Ehehe.. I dunno how to read the polarity.. But from what I gathered, the direction in which the arrows are pointing is the negative point which goes to the ground?
Yes either a -- or ¦ sign at one side should indicate the negative point of the cap...
Yeah. I figured it out. I got it runnin right now with just a cap and am doin a few benches.. Although im not too sure I can clock the memory much higher than 870 still..
When I break 900, rthdribl shows red artifacts and the games that had present artifacts still shown em proud. So ya think a vmem mod is in order here? I would rather see some pics of it done before I attempt it..
the resistor value i need is the last one in the row of 3 that you can use for the mod. last one meaning towards the molex end of card. so far card is working fine but its acting like the vddq or vref is wacked as my vddr is normal.
again the last resistor in the line of 3 that are pointed out as moddable points.
Irk.. Something went wrong. I got ahold of the 100K resistors and put them on to do the memory vmod.. although I must have soldered something wrong (All the soldering was done on the chip itself, no alt points used.. Dumbass..) and when I wriggled the wire, it shut the card off.
I thought to myself.. "Alright.. Thats commin off." So I take it off and all and looked at the pins under a magnifying glass to make sure nothing was bridged. Satisfied, I put it back in and it booted just fine! It goes into windows, and as I started up aim I looked away, but when I look back just a second later, the screen is dead! So I then try to restart it, but nothing. It goes through the normal boot procedures, but I cant see any of it. I then take off the cap and all, and its just fine again! Boot back into windows and ran rthdribl to make sure i didnt damage anything, and it was fine. No artifacting or anything, monitored the temps, everything normal.
Satisfied, I decided to keep it running, figuring it was okay. Well.. it wasnt! It took about 20 min for the card to shut off again, and now it does the same thing, Shows the boot procedure.
What I wanna know is.. Why does it shut off and not want to come back on, I assume untill you let it rest? I dont think anything is overheating and I removed the bridges (Or so I assume..) With a desoldering wick. I also made sure the pins were contacting well afterwards.
Whats causin it?
Oh, And I checked that resistor. Although im more than likely reading it wrong.. Its rated at.. 1? or.75..
This thread was a great read :). Is it possible that the power regulators on the 6800gt's are overheating when doing the 1.4v bios mod? As i notice that the black heatsink gets dam hot even at 1.3v, i run a vf700 now and it keeps its warm though :toast:
I am just wondering if the people who did 1.4v and lost their cards were using water or an NV5 which would make them run hot ontop of the 1.4v?
Yes, to a certain degree overheated but much more likely overloaded.Quote:
Originally Posted by orig3n
1.4V put a "lot" more strain to those 2 core related regulator chips or whatever it is :D, underneath that heatsink.
Ultra's uses 3 chips for the core which is 50% more powerfull, that's why Ultra's are more stable at higher core clock speed.
Under the heatsink it's also one chip for the mem, which seems to be sufficient. The mem voltage of ~2.02V is very stable even with a massive mem OC of 1250 MHz.
Ultra's have 2 of those chips for the mem.
:slobber:
Maybe thats what my deal is.. The board has a golden burn tinge to it in the corner where those things rest.. and it wasnt like that before I attempted the mod.
Is there anyplace where I can buy the same regulators that are used on an NU?
Well.. I just put in an order with IR for the two mofsets I assume are busted. Heres hopin thats all it is. Could that be what it is though? Seems like it would be with how its acting and all. It will only run for about 30 seconds before shutting off, then it wont come back on for some time. You have to keep the card out of the CPU for a while, then when ya put it back it, it does the same ol crap.
Hi! The link to that picture doesn't work. I have a gainward 6800LE and I would love to see that pic. There is a pic for the capacitor mod for the gward, but I couldn't find a picture of a vmem mod for gward.Quote:
Originally Posted by zadah
I was hoping to do the vmem and capacitor mod. Did anyone save that pic for the gw vmem mod on their computer before the link died?
Zadah you seem to be from Finland so I'll post this question also to muropaketti if you happen to go there also.
This thread is great! I have been searching for a vmem mod for my 6800le for quite some time.
Thanks!
Can anyone give a link or part number for the mosfets on the 6800 GT for the vmem and vcore than can be replaced/added on top? I would really like to try this and see how far it will get me along with the added molex.
there isn't any need of this pic actually cause all mods are referenced on the first post and all 6800 LE / NU share the same PCB ;)Quote:
Originally Posted by disciple
oh :). GREAT! Thanks DGB.
Could someone please measure the value of this Resistor :
http://home.comcast.net/~dmpickard/GPUpoint.bmp
I saw this post and felt that I had to reply ASAP, but my own account isn't mod approved yet so I'm on this one.Quote:
Originally Posted by Del Gro Badeu
The gainward boards don't all use a reference design! I know for a fact that the 6800NU boards from Gainward do not use the NU reference design, and I've been trying to figure out what the differences are, and if there's something different to do for the mod.
EDIT: this post seems silly after I realized that the pic in the first post is of a gainward board (although I dunno if that board was actually modded, or if it was just used for a pic? The other pic is a different board).
so mods gotta aprove ur account now before you can post? I didn't know that
Other than different caps used on the PCB, I've yet to see a 6800NU board that deviates that much from the reference design other than using superior quality caps etc...Quote:
Originally Posted by fackinlogins
Post a high resolution image of it if you have one that is significantly different from the reference 6800LE/NU design. :)
Well I can't find any particularly high rez pics, but here's a review with pics of the 6800NU (they call all their cards "ultra" in their product line but this is the NU board) 128MB version:
http://www.nvnews.net/reviews/gainwa...le/page2.shtml
It looked almost identical to the GT PCB when there was a shot of the two side by side, except the GT heatsink is a lot bigger than the NU heatsink so I couldn't see if there were actual differences.
I bought one recently though, and it's sitting in my campus post office waiting to be picked up but the post office is closed today (I got there before it closed but had to mail something and by the time I was done the pickup area was closed) so I'll have it tommorrow. I'll take some high rez pics of it.
I have the 256MB 6800NU version so it might be different from the pics linked.
EDIT: Boy I feel like an idiot, I just realized the PCB is the exact same one linked in the first post here, so whatever non-reference design it has the mod probably works on it anyway =p
Just got overly worried about people frying their 6800's =p Proceed as usual ;)
I can't wait to get mine tommorrow...I'm hoping to take this mod past just the capacitors if I have some time and can get ahold of some of those power regulation chips.
I was thinking maybe there's a way I could build a power regulation daughter card of sorts on a custom traced PCB. Problem is that it'd actually be kinda expensive to do so, but if I'm bored enough we shall see =)
You are mistaken, that card above you gave in the link based on the images is a reference 6800NU card, the reference 6800GT PCB is closer to that of the Ultra...
nobody can measure that resistor value?
Quote:
Originally Posted by Jethro
It is not a resistor, resistors are black and ceramic capasitors are brown, its a ceramic capasitor... try replacing it with same size component, if you are using resistor you are volt modding :) !
woah interesting. thanks for the reply Zadah. I have replaced it with similar component and the only way i could get it to work was buy penciling it some. value is not specific here>?
Card is working great btw other than the memory seems really handicapped
now.
Good information btw, learn more every day ;)
If you penciled it and it worked, it probably just connected the bridge, the cap probably wasn't important anyways, but I don't know too much about eh.... this kinda stuff.
The rails on that 430w Antec may be holding it back, in my case the vdd volt mod only worked after I added the extra cap.Quote:
Originally Posted by Jethro
im running a pretty light load on the machine really. down to 1 hard drive,1 opti and only 2 fans. Plus the PSU is modded so i dont think im running weak i think i just fried the ram to be honest :D lol. I have 2 caps on the card now also.
no worries at least the card is running. ive had pretty good success with vmods and cooling in the past 1 bad go at it is ok. :) Worlds of Warcraft doesnt strain the card much at all anyhow ;)
I've been looking through this thread and wonder if it's possible to make a daughter-card type board with all the neccessary caps and power regulation chips on it?
Where would the solder points be if you wanted to add more power regulation and a second molex onto a 6800NU?
Also, did anybody put the "missing" cap back on and find out if that did anything good?
i personnaly use a daugter-card to solder all my caps and VRs ;) the result looks like better :p
for the missing cap, nobody has tried at this moment ...
and for the extra molex, it's look like to be not recommended for a 6800 NU
If you were to add the extra mosfets I think it would take the strain away from the cards, and then you could add the extra molex right?Quote:
Originally Posted by Del Gro Badeu
maybe ..., but if i remember past post about this, the problem came from the PWN not from the mosfets :/
Has Anybody thried the 6800GT molex mod yet?Quote:
Originally Posted by OnLine
I'm working on it, got most of everything done, just waiting for my 6800 GT to get back from being rma'd. Kinda confusing for me to follow that diagram or w/e it's called, so I gotta keep looking back at the pictures to see whats going on :p: I'll post with pics when it's done tho.Quote:
Originally Posted by Nosfer@tu
i've just obtained a GF 4 Ti 4200 ... will test some torture mods on it :D an extra molex is one of them :p
I to have a Spare Gfx now. A Creative G2ti for backup if i :banana::banana::banana::banana: my leadtek 6800 Nu up!
With a window open I breached the bloddy 425 Mhz for the first time ever and accualy benched at 435 mhz core, This is only with wather cooling and Vbios mod.
Went to town today and bougth the following :
capacitor
Jamicon 4700uF 25V (105 C°)
SME 4700uF 25V (85 C°)
And a Phillips 1500uM 25 V (made an error :p)
25 Volt would force the card to use more Amps Yes ??? So thats is noot optimal???
2 SMD grabbers, Migth save me som
2 x Sunon 40 x 40 mm DC5 0.5 W fans.
Alsow I spoke to One of my teachers about the 12 V molex mod, He claims that it is posibel to do on anny card, the card would just not "Eat"/Juse the ekstra Volt if it doesent need it. Migth have to Change som Other stuff on the card to make it runn with it, but noot sure before we take som more time locking at it.
He alsow said that there would be volt stability to gain by changing the original capacitor of the card to some more expensive one´s.
But that to will need some investigation to :)
+When I Speak to my OC freind I wil poste som pictures of where to Glue profiles on the card. I belive it is some of the clock gens on the back op the card that needs cooling, It gave him 15-20 Mhz ekstra on core. hes running his Pov 6800 Nu at 325@430 Mhz with bios Vmod.
I belive I got every thing here :)
Ahhh BTW on page 1 it is recomended to juse 10 Volt capacitor. But I was informed that it migth blow if it geets anything above 10 Volt, And as fare as i Know they recive 12 Volt? Or am I mistaking here????
Regards Nosfer@tu of Denmark :p
No, they arn't recieving 12v, they are only recieving probably about 1.4v or w/e the core voltage is, this just comes from the 12v line (or is it 5v even?).
Wish I had cool teachers like that
cant someone measure it?
As far as I understand it will pull more Amps because of the higher Volt capacitor. And there for you cant use as High an µF capacitor????
Just my basic knowledge, But I migth be Wrong??
No, the capacitor voltage rating is only the max voltage it can handle, it makes no difference if you use a 10v 2200uF cap or a 25v 2200uF cap in terms of how much amp the device is pulling, the voltage draw will still be the same.
Tigth :DQuote:
Originally Posted by stealthbomber
Does anybody know if it is posibel to colder the core capacitor RIGTH back on the core, It should give better stability Im told?
------------Quote:
Originally Posted by zadah
hi, i am new and from germany... so excuse my english plz ;-)
so some time ago i bought a msi nx6800le TD128
i hade those black screens every time running at standard 300/700
if i underclock the mem to 501 its running fine.
so i decided to do the capaciator mod with the mem...
result: same :banana::banana::banana::banana: as before... blackscreens in every game running at 300/700 or more.
------------
now i want to add an extra capaciator for the core voltage...
the question is:
IS it the TP11 Contact at my MSI card, too??
and: I changed my Vcore in graphic card Bios to 1.2V... is that a problem or should i set it back to std if i make the core Voltage mod??
greetings from munich
money
I had the same Blackscreen "feature" with my piece-of-crap Gainward 6800LE. Indeed the cap mod alone didnt fix the problem however, in addition to the cap mod i undervolted the memory to 2.66V and it works fine. I also fitted a cap to the GPU rail and fitted heatsinks to the mosfets and ISL voltage control chip.
I recommend that you lower the RAM voltage to around 2.6V to fix the problem. My card is now stable at 300:700 in all the games i have tested.
Bila
sounds good. with witch tool can i do this undervolting?!
atm i installed riva tuner nibitor and nvflash...
please, i need help...Quote:
Originally Posted by Bilabong
how can i do this undervolting ??! :wierd: :am:
I doubt that it works with software - but if there is any software with which i can do this please tell me the name...
And if it is a hardware mod so please tell me what to do to undervolt this card (MSI NX6800LE TD-128)
thx money
i've just finished all 6800's mod :)
now i'm waiting for a proper cooling ...
To undervolt the RAM you need to solder a 100K Variable resistor between the feedback pin for memory (red bit on the first page if i remember right) and the 5V on the molex.
MAKE SURE THE VR is set to 100K or you will cook the card! :slobber:
This will lower the memory voltage a little. On my card with a 100K variable resistor at 100K it drops Vmem to 2.66V. Without this mod i get the blackscreen "feature" sometimes at 300:700, with it i never get a blackscreen.
If i raise the Vmem even a little i get a blackscreen on bootup.
I have no idea why it works, but it does on my card. AFAIK the Hynix is a 2.8V chip, and 2.66V is at the bottom end of its tolerance... i can only assume that its a querky batch of chips?
Bila
BTW i also have the cap mods and mosfet heatsinks.
I find it very freaky that you solve the problem by undervolting your ram. :confused:
Del Gro Badeu I have just send you a PM, Please reply ;) :cool:
-------------Quote:
Originally Posted by Bilabong
i never heard "variable" resistor...
perhaps u can find out the right resistor for me, here:
conrad electronic market
i would be proud, if u could do this for me...
just post the link to the right one...
thank u all!
greetings money
chek your PM ;)Quote:
Originally Posted by Nosfer@tu
There. Just take the 100 K variabel regulatorQuote:
Originally Posted by money2
http://www1.uk.conrad.com/scripts/wg...ad_area=241660
You have been addet ;)Quote:
Originally Posted by Del Gro Badeu
BTW I reached 435 Mhz a few days, This is only with V-bios and astek whatercooling :D
HOPING for the 487½ Mhz = 50% Oc soon :D
Quote:
Originally Posted by Nosfer@tu
fu... the links didnt work...
i am not foxier then before ;-)
perhaps u can post another link or the article description...
sorry for that guys, but it is a really very new environment for me and i dont want to cook my card ^^
money
I agree, but i guess it could be explained by faulty overvolt protection? or another random power supply fault on the card?Quote:
Originally Posted by Nosfer@tu
Its not like i used to get freezes... the card shut itself off totally and gave me a blackscreen. When this happens Vddr and Vgpu fall to 0V and it can only be brought back to life by a hard reset.
I think there is something fishy in the overvolt protection... but i dunno which chip controlls it.
Any ideas greatly appreciated!
Bila
PS AFAIK in a later board revision, they changed a capacitor, inductor and the V regulator.... these cards dont suffer from the blackscreen "feature" apparently.
So maybe you need to change those?Quote:
Originally Posted by Bilabong
I wouldn't bother unless you got an extremely good overclocker, I'd rma it.
I tried that... Gainward ignored my repeated requests, then banned me from their forum. See this post for further details if your interested in Gainward "technical support" : http://forum.gainward.de/viewtopic.php?t=721
TBH id rather not go into it and keep the thread on topic... Alas, after some tinkering i managed to fix the card with lots of help from Zadah.
:toast:
It appears the posts from Zadah on that forum suggests that Gainward deviated slightly on the nVidia reference design of the card which is the cause of the problem? :stick:
Call up gainward technical support, ask to speak to a manager and just yell at em, and tell em the situation and how the bs'd you on the forum
I have a 6800 GTO PCI-E - on the same pcb ast the GT and ultra.
u guys want hq pics? pics?
i'm greatly in need of a ram vmod! :)
sure we want hq pics !!
I would like to remind peapol that It migth be a good idear to set Vagp to 1.55 Insted 1.5
I started to se white dods and geet spontanius reboots :(
before i start modding like a Psyko I would love to geet som more fedback regarding results????
Also i have a littel picture you migth want to tjek out, Adding profiles on the marked areas gave me a bost of 15 Mhz on core.
So before i couldent bench at 425 Mhz, but 423 was okay.
Now I can run 438 Mhz :D
Just cant Oc my ram more then 11 mhz because I only have a standard astek whater head :( Did 880 mhz on air thoug :D
no problem with Vagp ^^, i'm currently running it @1.6 ...if i run it lower, i've got some CPU overclocking issues : /
ok, here's some pics of my PCI-E 6800 GTO. this card is on the 6800u/gt PCI-E pcb.
http://oc-lair.com/pub/6800gtopcix.rar/
404 :(
I belive its a
ISL
6634CV
L0427HBNG
And on IMG_0030
I se a 14 Pin
43CHICK
ACTOS
Hope it helps!
Nosfer@tu of denmark
should i google the datasheet for those?
edit: sorry, my bad for putting the / in
there has got to be a connection here.
here's the same chip on my board, and the same chip vr-zone vmodded
http://www.oc-lair.com/pub/images/6800u6800upcie.jpg
i think the vmod would be easy but to find a measuring point would definetly be the hardest
i did as best as i could to trace the measuring point back to the chip for the 6800u AGP vmod from this pic:
http://www.ixbt.com/video2/images/nv...-scan-back.jpg
I think it's 4th pin from the top right of the IC. I measured it and got 1.043V so that can't be it.
it could also be pin 5 from the top right.
i tried that, i got 1.173V.
we're looking for 1.3-1.4 or so, right?
I also measured pin 5 on the top right when running 3dmark03.
i measured 1.155V
pin4 from the right didn't change voltage
i will take a look tomorow, i'm a bit sleepy actually ( just come back from a long night party :D )
but if it's the same chip as one on the ultra, the mod will be nearly the same for this one too :)
Try to Look for TPxx They are read points!
I would say that you should have the data sheet. But lest se What Del Gro Badeu comes up with when he wakes up :p
^^ i just awaken :p
i've somethings to do before, and i will have a look during the night i think :)