A Big Thanks to Mickey Mouse for VModding My 7800GTXs!!
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A Big Thanks to Mickey Mouse for VModding My 7800GTXs!!
:banana: :banana: :toast: :toast:
Did vcore and vmem mod.
But i get no volt to mem when booting =(
Vcore reads 1.285 and vmem ~0.
Get no picture on screen but computer boots up.
Tripplechecked VR and they are fine at 100.4K for mem and ~197ohm for Vcore.
Cut the cables for mods and still mem reads 0.
Ahw sorry Jason. Didn't know you and MM were one in the same. Never did get the Vmods you were going to send or sent. Wrote you a couple of times but got no reply after our first few emails. I may have blocked your email domain by mistake lol.Quote:
Originally Posted by MickeyMouse
I finally stumbled across them at a couple of other places (I believe the Vcore was your picture from imageshack if memory serves), cleaned them up and shot some pictures for Malves.
I have never taken credit for the original mods. Near as I can tell they came out of nVidia R&D proper when they were trying to bust some records since there was an NDA on them for a while.
Viper
As Jason pointed out they both do the same thing. I just picked up alternate solder points that were easier for most people to use. Not to many people can solder to the end of a 401 size SMR to start without killing it and if they do it is fairly easy to rip the end of it off with a slight tug on the lead. I always pick up the ground plane close to the mod point to keep noise down in the regulator feedback circuit.Quote:
Originally Posted by eclypse
Viper
Your picture looks correct but there is obviously a major malfunction somewhere (gees that was a hell of a big help huh!).Quote:
Originally Posted by Ubermann
Viper
I generally limit the HP3D Vcore to 1.600 to 1.620 on 24/7 cards I mod no matter the cooling. I found most NV47 cores do not respond with any meaningful increased OC above that point ( yes there are of course exceptions ). There seems to be some rather shakey evidence the cores may flat out not like Vcore above that point as far as life is concerned (like the NV40's) but it is very hard to separate the wheat from the chaff in the forums.Quote:
Originally Posted by eclypse
I run 2.300 - 2.325 Vmem regularly with good ramsinks.
Viper
Ok thanks ViperJohn! Thats good to know.. Well i've done one of the 2 cards now. Now to get the second done before my wife gets home from work with the baby.
:)
Thanks for all the help and thanks for making this thread!
Sorry to ask another question but since i have no idea.. whats a good overclock after these mods?? 600/1450??
Ok cool thats good to know cause i thought that maybe my overclock was'nt taking cause the one card is doing 600 right now. Kept the mem at 1450 cause i'm only concentratng on the GPU atm.
Thanks.. I'll be sure to report back when all is said and done.
Oh.. i'm glad the second card is done hehe. FIrst graphics card volt mod! Well 2nd if you count a pencil mod which i doubt counts. I'm used to moding motherobards.
I found the early OC series card hads little trouble going over 600 core on air but lately the cores haven't been nearly as good on the cards sent to me. Like everything else CPU/GPU related the production lots run hot and cold with some decidedly better than others. There seems to be a really good lot out there running around now though.Quote:
Originally Posted by MickeyMouse
Best cores i've ever had were on engineering R&D sample cards. I had a couple of x850XT TVO samples with cores that stone ass stock would smoke most modded production cards. Nothing like keeping the cherry cores close to home lol!
Viper
Well both cards are working great! Thank god.. hehe
Since i was in a hurry i just set the voltage up like you suggested viperjohn. Its good that i asked since i dont have the time tonight to spend hours on hours finding that sweet spot with the voltage.
The first card was stable at 611/1502. :) I tried 620 and i'm not sure if it was the card or the cpu but it errored out to the desktop. Tried 1520 and i got a funky striped screen right away.. so these numbers are enough to satify me thats forsure lol!
Second card seems to have no probs with this either.. I might try higher though it dont matter since both are going to run the slower card speeds.
What value does this one have ?
http://x2.putfile.com/10/27302592073.jpg
Small solderpad (C515) next to this one has 0 Volt.
I give 1.60v on GPU (OVP on) and 2.5v on MEM :D
That gives me 630\1750 :D
You have one very nice card!
If i make this alive again i think it should clock well.
I did the mod as in this thread: http://www.xtremeresources.com/forum...ad.php?t=37362
It was no mess and kinda "easy" to do.
But the card just dont work any more ?
People say this mod kills cards but other say the modder did something wrong.
What is true ?
Computer reboots 4 times with the 4th led blinking ever time then starts loading windows without gfx on 4th try.
Anyone here killed the card and what happend to you ?
I have 0 volt on vmem small solderpad.
Well i'm completely lost and really confused here.. The cards run the same benches at 490/1386 as it does for 611/1508????? How in the hell can that be!
I've heard of the temp bug.. but i've edited my bios and takin out the throttling and only left one performance mode period.. just the 3d speed.
I'm talking before mods i got 32,000+ and now i get 30,000-31,000. Temps are cold at 31-33C.
Exactly which benchmark are you running for these scores?Quote:
Originally Posted by eclypse
Oh sorry.. Had food in the microwave and was in a hurry.Quote:
Originally Posted by Weee
3dmark 03..
05 ran faster as well..
01 i got 35,500 and now its only 30,000-31,000
I've had a similar experience in 03, basically I'm so worried about how high up the wazoo I tweak my grafx, That i am usually lax about the rest of the settings for my comp that I use when running the other benches.
I only see a significant benefit from the volt mods in 05
-Weee
so i didnt read the whole thread yet (plan too soon)
but how hard is this to do traceless? Or is it virtually impossible?
You did something wrong.Quote:
Originally Posted by Ubermann
Viper
Run RivaTuners CPU speed graphing function in the background to be sure the card clocking all the way up to your set HP3D clock + 40Mhz GDC.Quote:
Originally Posted by eclypse
Without a bios edit the cards will often only clock up to LP3D levels when you really lean on the HP3D clock.
If you are using 77.77 or later drivers you will not have temperature bug issues.
Viper
this is gonna be sweet !
so anyone, how hard is it to kill your card with this?
I mean Im gonna do a ton of soldering practice on a really old vid card of mine, to get a hang of small point soldering. So as long as i use the right parts, and the soldering is good, and i turn the resistance way up, im fine right?
That totally depends on the soldering equipment you use and your skill level.Quote:
Originally Posted by sdat1333
Viper
alright well im gonna practice A TON before doing this
can you recomend a good but affordable soldering iron?
And Im sorry to bring this up again but i was the first few pages and im really sorry about your dad, but it sounds like he was a beleiver and hes in heaven now
Any decent 25-30 watt iron will work but the key is the iron tip. You need a micro point iron tip (.3mm or .015" max) for the small solder points. I make my own tips from alloy 182 Hard RWMA Class 2 Chromium Copper and grind the tip to a point. The hard alloy keep the tip points from getting screwed up.Quote:
Originally Posted by sdat1333
Thanks on my dad. My mother passed away 22 days later on 7/31 as well. I was in Oregon two weeks ago to scatter their ashes on the property they used to own up there (tall timber country).
Viper
oh i didnt even see the part on your motherQuote:
Originally Posted by ViperJohn
i cant even begin to imagine what your going through
well since i dont really have the ability to make my own, wheres a place to buy the tip?
I got a pretty decent one from radio shack.
I think it said pro's kit on it or something like that. One of the tips had a nice point, so maybe they have replacement tips for it there . It has 20W and 40W settings, just make sure you set your iron to the lower settings, or you'll end up pulling off a 402 just by touching it! Having a really nice set of tweezers helped me a lot when this happened!
alright ill make a trip to radioshack in a few days then
I have a prob.. Seems like the cards are going into 2d speeds half the time and are not changing into the 3d speeds once i run 3dmark..
I've verified this with rivatuner.. I run 3dmark and a min later not even i exit out and check that graph and it shows it never changed from 275Mhz on the cores.
I keep trying and once in a while it will but i dont know why its not everytime. Really buggin me.
Before i was using a modded bios i was using with only the 3d perf enabled and the clocks at 490/1400 at 1.4v and with the volt mods its runing at 1.62 and 2.32v on the ram 24/7.. So i thought changing it back to the normal specs with the 2d and throttle in there would be smarter so the card would run cooler in 2d.. but now i'm getting this stupid prob.
Someone said that the temp bug or throttling bug isint a prob after the 7.77 driver version so i thought i'd give it a shot since i'm using the 78.3 drivers.
Any ideas cause i think it would be annoying be have to keep checking to make sure its going into 3d pref mode when i bench or game.
I see highly core OC'ed cards that often will only clock up to the low power 3D clock the first time you try to run 3DM03 and 3DM05 but have never seen one that would come up off the 2D clock.Quote:
Originally Posted by eclypse
Try the 81.84 drivers and see if it makes any difference at all.
Viper
Well i tried those drivers but there a known bug with them with 2 cards installed.. It seems it cant tell you have the SLI board attached! So those are no go.. I was going to go with the old set a 80's betas but then since those would make the cards bench higher it would be tough to tell if there working right.
In another thread someone suggested to mod the bios with only 2d and 3d, saying that the throttle might be givin probs.. I dont see how since its stayin in 2d insted... tried that and the same crap would happen.
So i went with the 77.7s and it was'nt any different.. sure it ran a little faster but it still had probs turnin on the 3d everytime..
Another strange part is that sometimes when its showin the 3d speeds are enabled in riva tuner via that graph its still very slow like a 1/4 the speed.. I've been using ATiTool (v2.5 i believe) to overclock the cards and using the 3d cube to make it switch into 3d speeds on the desktop.. And you can see the frame rate which verifies the speed.. Sometimes it shows 280-300FPS in 3d mode and sometimes when it shows that the current speed is the 3d pref its still slow as like the 2d is runing at like 130-150FPS.
So i dont know what the hell is going on or what to try next.. I think i need to just flash back with just 3d speeds only and see whats up.
Rivatuner causes problems with the 7800GTX. Do this, rip your BIOS to your HD using ATI Tool (then uninstall it). Use NiBTor to modify your BIOS. Remove the 3D low power and change your clocks by flashing the BIOS. DON'T use Rivatuner to OC....just to monitor frequencies. Flash your BIOS (can do SLI flashes) using NVFlash 5.15. Works like a charm.
Yeah thats what i have been using to flash the cards.. i've flashed before last night with no 3d low (Throttling) with just 3d and 2d at 608/740-1480Mhz with a 50 delta.. I believe i'm even using NVflash 5.15 but will check.
But i'll try what you said by not changing the overclock with ATI Tool and see if i have probs.
Hey thanks freecableguy! All is fine now it seems.. as long as i dont change the clocks with that Ati Tool everything is perfect.. It changes back and forth from 2d to 3d no probs.. Benches no probs and is fast at 608+50 Geo/1480.
Now what other program can i safely overclock with as i'm still in the process of tweaking and finding the bottom of these cards..
Oh wait after re-reading your post.. I am using Ati Tool to overclock and river tuner to monitor speeds.
Great now what to use?
Overclocking should be done by BIOS only. Find you max clocks and flash your card to these speeds. Don't use an overclocking problem as it doesn't work right with these cards in SLI right now.
I have two BFG 7800GTXOC, and I absolutely can't get them to run with a delta under peltier cooling. I Have tried many many many BIOS versions and no matter what, The computer locks up whenever I try and run with a Delta, If I use a BIOS modded to ignore temp sensor, and NO delta, it runs just fine. I've been really busy with work, but every time I have had a free moment at home, I've been trying at least 10 different permutations of BIOS. Like, the BIOS for my card with just temp sensor disabled, no good.
When I use 3 performance levels, it runs fine in 2D mode but computer locks up when I run a 3D application (With Delta turned ON). With one performance level, the cards won't make it past the windows scrolling bar screen (77.72 or 78.03 BIOS versions).
Any clues? I think i could eek out quite a few more points if I could put a Geo Delta back on!
right now @ 594/1520 cpu@3.27GHz I max out at just over 15k, I want to get this all sorted out before my Chilly1 SS for my cpu comes in a few weeks, so I don't have too many things to try and do at once!
I got two trimmers at a local store. They are 15 turns, is that safe?
Also i measured the 200Ohm one and it only seems to go up to 187Ohm... Will that be a problem? The 100K one reads 96.5KOhm
Thanks.
77.72 and 78.03 are driver versions not bios versions.Quote:
Originally Posted by Weee
Viper
Wither trimmer is fine. Being only 15 turn the setting will be slightly touchy so just go easy on the adjust screw until you get a feel for it.Quote:
Originally Posted by Gogar
Your 100K's Vmem trimmers are fine as well. I am using 50K's now.
Viper
Haven't had any trouble with SW OC's here with cards in an SLI.Quote:
Originally Posted by freecableguy
Viper
Sorry you're right, i used 77.72 and 78.03 driver versions, and i've made bioses based on 11.01 and 11.25 or i think that's the ones. I asked lardarse/shamino about the problem I was having, and he verified the existence and told me that I should start 3dmode warm and then turn on my cooling for things to work properly and make sure it doesn't go back into 2d mode or things will not work.Quote:
Originally Posted by ViperJohn
I had that problem and it was because i was using Ati Tool to overclock the card. Once i just set the overclock in the bios all has been fine.
http://malvescorner.net/images/7800vgpu.jpg
this is the right mod for vGPU isn't it?
Indeed (I know when I was looking for this I wanted confirmation from as many ppl as possible)Quote:
Originally Posted by MickeyMouse
Have anybody done a pencil trick on 7800GTX?
can someone explain how to back up/edit and re-flash the bios on a 7800gtx
would also be helpfull if you could list the programs used
many thanks
ok ive backed up the bios, edited it. now how do i get it back onto the card?
Download nvflashv513.exe. Now unzip the contents to a blank formatted floppy disk and also load your original bios (just encase theres something wrong with the new one) and the new edited copy onto it.Quote:
Originally Posted by cheap
Make a bootable floppy for you can get into pure DOS.. If you dont know how just take a blank floppy disk and insert it into the floppy drive. Open up windows explorer and right click on the A drive and select make a bootable disk.
Now boot the computer with the bootable disk installed in the floppy drive. There will be some options that come up on the screen asking you if you want to boot into windows ect..ect.. Choose the one that says command prompt.
Now put in the other floppy disk with the nvflash and your original and edited bios.. Type nvflash.exe -5 -6 "name of the bios file .rom" and hit enter.
It will search for the card and when it finds one it will ask you if you want to flash this card and hit "y" i think or enter for yes.. Reboot without the floppy disk and your all good to go. If theres any probs do the flash again but this time with your original bios.
thanks for the help, much appreciatedQuote:
Originally Posted by eclypse
do these cards have ovp? whenever i give the core more than 1.6v it locks up? is there a way round this?
i think the mod actually targets the part of the card that senses voltage by making it think theres less voltage than tehre really is.
I just think GTX's dont like too much voltage
Are you setting that 1.60 Vcore while idling at the Windows desktop in 2D mode??? If you are that would put the Vcore at about 1.87 when that card goes into low or high power 3D modes with a stock bios.Quote:
Originally Posted by cheap
Viper
no. im running 3d mark 2003 and checking the voltage while its running. it measures 1.6v. if i adjust it any further i get a lockup.Quote:
Originally Posted by ViperJohn
At what point should i increase the voltage? while running a 3d aplication or at idle in windows?
I wouldn't go beyond 1.7v
what about your score in 3dmark05?Quote:
Originally Posted by Mysterfix
Is it possible to do the mod using a pencil on c569 for vddr and c525 for vgpu?
I've seen the question about pencil mod several times without any answer, so I guess it is not possible or nobody figured that out yet
It should be possible to pencil mod the Vdd on the 7800GTX, but I don't think that you would gain much from pencil modding the Vgpu, due to the low value of the feedback resistors in the Vgpu regulator.Quote:
Originally Posted by G-Man
I don't like pencil mods myself (because they are much too risky IMO), so I'm a bit reluctant to find pencil mods for the card, but someone really needs them I might be persuaded to look into them ;).
Pencil modding on Vcore would not work at all as the resistances involved are to low.Quote:
Originally Posted by kiwi
They would work on the Vmem mod, assuming you could even get the lead to stick, but with the resistances involved there you may way overshoot the mark.
Pencil modding is at best a hack and a half.
Viper
ViperJohn a bit of OT
I was going to vmod my GTX over the holidays and I have a nice Xeon HSF to put on it. However, where the heck do you get the screws thin enough to fit through the PCB holes?! I looked everywhere.
You can use 2-56 screws. You can buy them by the 100 from Mcmaster Carr or hit your local hobby shop.Quote:
Originally Posted by IvanAndreevich
Viper
damn i'll have to buy a 7800GTX to vmod it (using "no wires" this time ;) )
i'm using 1,5V on my GTX now für 24/7, what do you think is the max vGPU i can give for 24/7?
Thta is the best and cleanest way.Quote:
Originally Posted by Supertim0r
Viper
why shouldn't you use wires to attach to the pcb and then to the trimmer. other than not liking the look of the wires is there any other reason not to use wires?
Read through the whole thread and you will see ViperJohn give his explanation for this at least twice that I can remember.Quote:
Originally Posted by cronic
I ended up going with wires simply because I planned to change the voltages often, and inside of a case it was very hard to change voltages on cards in SLI with the recessed vGPU pot.
Thanks - I would have typed it out again if I had not seen this lol.Quote:
Originally Posted by Weee
Viper
Sorry man, I just saw this, here ya go 3dmark05Quote:
Originally Posted by Barr3l Rid3r
Your memory speed is killing you.Quote:
Originally Posted by Mysterfix
Viper
I know, I'm in the process of tweaking it right now. I got it up to 1390 so far and I'm running stability test as we speak. It seems that the core on this card is very strong but the memory is lacking a bit. :)Quote:
Originally Posted by ViperJohn
EDIT: Well after some hours of testing I'm at my max on this card for memory. The memory won't go any higher without puking all over the screen and locking up the computer. It was good for another 100 points in 3dmark05
are there any pics that show a vddr mod as good as these do for the vgpu?Quote:
Originally Posted by ViperJohn
Viper or other?
http://jason57.iwarp.com/148gskillfx...48fx/ddddd.JPG
A freind of mine did the mod today but soldered to the solder pad under the one in your guide. What is this? Is this part of the circuit a ground or something away from it all?
Thanks
Please respone ASAP
Kazoo
That pad and the one above it are traced together so it will still work. The GenRad test pad normally used (and above where your friend made his connection) was chosen because it was larger target for people to land on.Quote:
Originally Posted by Kazoo
Viper
What does the red wire mean :confused:
Quote:
Originally Posted by Weee
The red wire was drawn to show what point the person actually soldered to in the photo Kazoo showedQuote:
Originally Posted by ViperJohn
I ended up soldering where my little red wire is shown, since I lost the first pad when my pot ripped off when I went to turn it =\, and then that leaves the one Kazoo showed floating, leaving only direct hit to the SMD
Hey i was thinking i should make a switch into my fan controller to turn the vmods on or off, but i doubt it's a good idea to put long leads and a switch between the resistor and ground.
Is there any good way to do this.. Opto coupler maybe? Never used them before but i think that might be what i'm looking for.. Any thoughts? Thanks
You are correct it is a bad idea.Quote:
Originally Posted by Gogar
Viper
There has to be a way though, does this look like it may be a decent solution?
http://www.gogar.com/vmodswitch.png
Some page about optocouplers says thishttp://homepages.which.net/~paul.hil...rol/Optos.htmlQuote:
However much electrical noise is on one side, it can never be transmitted over to the other side.
I'd say just take the few extra seconds to turn your pots all the way to the maximum resistance/lowest voltage values which are close enough to nominal that I'd say they are "safe" but that's just me
It really isn't needed especially on a 6800/7800 card. When you are in 2D mode the Vcore drops .200 volts without mods. If you were running modded with 1.650 Vcore in HP3D mode that would be about 1.410 or so in 2D mode with virtually no load on the GPU so very little heat rise. A stock 7800 runs 1.40 -1.410 Vcore in HP3D mode with a lot of GPU load and heat so wthat are you worried about lol.Quote:
Originally Posted by Gogar
Another issue with instantaneous large changes in Vcore, like when you switch, is in and of itself is hard on the core. You get momemtary current surges (only last a couple of milliseconds but they are still there). The regulator can also under/over shoot and ring with large instantaneous change as well.
Went the drivers switch the VID's to change voltages at mode changes the voltage ramps up and down over several milliseconds by design. When you make sudden changes in the voltage feedback the regulator(s) try to respond and correct immediately.
Never suddenly switch the memory voltages in any case.
Viper
I see.. the instant change thing sounds pretty dangerous indeed. And i dont really have the equipment to go any further. I guess i'll first just see how the vmod goes and what the heat output is in normal use, i just like my stuff to run quiet at night you know ;)
When a new VID is presented at the VID pins, does the voltage change immediately or is some kind of trigger required to initiate the ramp to a new voltage?
Thanks!
I Did the vmod, vcore, and also the vdd mod. But the vdd mod came off. With a tiny piece of pcb. I can't solder it back! The card works perfect, 580-590 core @ 1,58v.
Is there an other way to do the vdd mod?
edit: This one came off:
http://www.utforce.info/mod.jpg
try rosin to clean the surface first and resolder it
will the vgpu mod work on the 7800 GTX 512 MB "Ultra" ?
Generally when the voltages are changed using the VID's pin the voltage will ramp (Slew) up or down over time. The slew rate is just "X" volt change over "Y" amount of time. It can be designed into the regulator or set (programmed if you will) by the regulators supporting component values.Quote:
Originally Posted by Gogar
The regulation feedback ciruit on the other hand is designed to deal with small the changes in PS voltage output caused by load changes in load on the PS. These are dealt with instantaneously, within the response time of the regulator at it's operating sampling frequency, to hold the PS output voltage at a relatively fixed level. There will always be some slew due to the impedance of the PS's final filter circuit but it so minimal compared designed in slew rates for large deliberate changes in PS voltage output using the VID pins, that would could say there is none.
Viper
Probably but won't know until I see the cards PWA as my crystal ball broke a long time ago lol.Quote:
Originally Posted by albertwesker
Viper
Damn, my 7800GTX died when i removed the voltmod, the chip came off....
:( :( :( :shakes: :bsod:
that sucks, i destroyed a 7800gtx a few moths ago, so I know how you fell. sorry
If i do Vmod and then remove it my video will die ?
which chip? :shocked:Quote:
Originally Posted by DesertShooter
The Vgpu mod chip.Quote:
Originally Posted by Victorshen
Not if it is done correctly going both ways. It comes down to the tools you use and the skill you have using them.Quote:
Originally Posted by AC/DC
Viper
I did both mods, Vgpu works fine and Vmem did work fine =(
Was running it 2.4volt on ram yesterday, today when i started the computer and put checked with multimeter it was reading 3.0volt!!
So i killed psu and screwed the resistor down and rebooted.
It started at 2.4 and slowly raised to 2.8 so i killed psu again and cut the cable to voltmod.
It still starts at 2.4 and raise slow to 2.8.
Ram is not very hot but can be runned at insane speed but what can be wrong ?
Platoonsgtelias is happy with 1750mem but i beat him :D
So now i just sit and wait for card to :explode2:
I think you're supposed to buy yourself dinner before doing that. ;) Man - that sucks... is it dead, Jim?Quote:
Originally Posted by cronic
I know what you mean. Thanks budQuote:
Originally Posted by revenant
sorry - a joke in poor taste.. *sigh* anyways, did your card recover from that? I'd be very careful about messing with the pots settings while the card is on.. wow.
Anyways. I just picked up a pair of BFG OC GTXs (256) and am thinking about the vmod action for core and memory... trying to pick the best method for doing this... hrm...
Quote:
Originally Posted by revenant
NOPE I SOLD IT FOR PARTS
I had my iron too hot, took off one of those tiny SMD parts, but I just put it back where I took it from, and everything was okay. even if you lose a part as long as you have a pad to solder to you can usually find the part and replace it.Quote:
Originally Posted by DesertShooter