Man I love this Card! My Card runs with 820/1998/1020 on 1.19V. I think that is pretty good. Thank you guys for this nice mod.
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Man I love this Card! My Card runs with 820/1998/1020 on 1.19V. I think that is pretty good. Thank you guys for this nice mod.
Ahh, finally someone has the same piece of 8800GT :D Any good news? To be honest, I've no idea if the jumper really works as I can't measure the vGPU from the points. I currently had the jumper at 2-3 (the 2 pins closest to PCI-E connector) so does that give 1.3V? (refer pic below)Quote:
Originally Posted by largon
http://s2d1.turboimagehost.com/sp/32...alaxy2-pin.JPG
I have also removed the heatsink and changed the thermal compound to MX2, modified the fan connector so I can control via my Zalman fan controller.
Nevertheless, I'm still keen to do some vGPU and vMem mod :yepp: Btw, what's the highest core/shader/mem you manage to OC?
I just got me a new XFX8800GT to run in SLI with my old one which has the original refernce PCB... now the new one has a different layout... Ive already Vmodded the old one. any help on a Vmod here? im desperate at this stage :(
http://img337.imageshack.us/img337/9...to00003gk5.jpg
http://img408.imageshack.us/img408/8...to00004mx6.jpg
Ok, I finally got to measure the vGPU from the following points. I previously didn't contact the ground correctly so there wasn't any reading - my bad.
I've found out that without the jumper, the vGPU is 0.85v and 1.1v then 1.25v respectively. This sucks as I don't have 1.3v!!! I tried using 2 x PCI-E and 1 x PCI-E but it doesn't help in overclocking.
I need vGPU mod desperately, lol. Someone help?
GRIMREEAPER,
YGPM @ ocforums
Actually I don't have the card. Been working on it "remotely". Progress so far includes some useful stuff such as a reverse vGPU mod.Quote:
Originally Posted by aoch88
:rofl:
Yup I got the same card and have been working on a mod with Largon! The Samsung memory is definitely better and I got volt mod in place for it running at 2.2V at the moment which gives me a 1220Mhz OC. The problem with the GPU volt mod is that the tracing on the PCB disappears inside of the PCB so nobody knows where to solder the VR too. I'll get it done this week and solder straight to the L6712A! That should be fun.Quote:
Originally Posted by aoch88
The jumper only gives you 1.22V on my card which is enough to take it to 780Mhz. You need more juice to go for more!Quote:
Originally Posted by Renegade5399
Thanks HitandRun and Largon :D Btw, can you guys share the vMem mod?
My RAM can't run 1000Mhz as the stock cooling does not have ram sinks on them but just some rubber material (so called thermal pads) to contact between the HSF and RAM. It's probably too hot so I need to mod it a little and put ram sinks.
aoch88,
vMEM for Galaxy 8800GT:
Attachment 73438
Damn, this sucks, what camera's you guys use to take those pics... I only have my Nokia N95, Motorola Z8, N91... :(
Thanks, you did that and it worked? Btw, where do I measure vMem? I can't seem to find a diagram of it?Quote:
Originally Posted by largon
Digital camera :rolleyes: I do have a N95 but the picture quality in macro mode just sux.Quote:
Originally Posted by GRIMREEAPER
I wouldn't make all the volt mods and run the stock cooler on it if you want to burn up something! I made some custom heatsinks for my card!Quote:
Originally Posted by aoch88
http://img135.imageshack.us/img135/8079/37799617cb2.jpg
http://img221.imageshack.us/img221/8887/53380478wj1.jpg
http://img221.imageshack.us/img221/9787/21587479bv0.jpg
Right on!Quote:
Originally Posted by largon
Thats what I use! Enough power for what I do!Quote:
Originally Posted by GRIMREEAPER
Metering points for memory! Red to ground will get you where you want to be! :)Quote:
Originally Posted by aoch88
http://img215.imageshack.us/img215/1...asuringid2.jpg
Measuring point added to the pic in my earlier post.
I just use a cheap digital camera. The trick is to zoom in, and pull the camera back a bit so it can focus. Lots of ambient light helps; sunlight is best. Use a tripod or items to steady the camera and use the timer, or else your pics will be blurry. Also, I took some of my very close up picks while focusing the camera lens through a magnifying glass.Quote:
Originally Posted by GRIMREEAPER
ahhhh, cool, thx for the advise guys... will give it a try :)
Do you fix your OC Clocks in BIOS or is it better to use River Tuner to boot up new clock?
I normally won't hard code it in the BIOS because if I'm not playing any games or pure surfing, I don't need that extra Mhz (overclock) :)Quote:
Originally Posted by Ceph
Just to avoid generating unnecessary heat and usage of power when not needed :D
riva is easier then if you overclock too far you can just turn it down... when it get stable you can set it to auto oc when you boot up...Quote:
Originally Posted by Ceph
Thank you so much to HitandRun and Largon for sharing this great vMem mod. I've done it successfully and now running with 2.15V. I'll test it out and see how well it goes. Prelimanary run with 755/1875/1030 gave around 14700 3dMark06 - not very impressive though? :D
Nice that it worked out for you! I'm running the mem on 2.20V @ 1220Mhz. Just finished the GPU mod as well and will test it tomorrow. I nailed the wire straight to the IC (pin # 22)! I'll post some pics tomorrow. :clap:
Nice idea with that heatsink.
Maybe thermalright will see it and ship heatsinks like that stock with theirs!
Wow, that vGPU mod would be excellent. Thanks HitandRun and we'll be waiting for some pics and results.
I'll post some pics up of my modded cooler. The temps are alright, with about 42-43C idle @ 1.25vGPU. Load can go up to 55-56C with ATI Tool.
hmmm looks like these Galaxy cards are REALLY good
i might go buy one to test out
samsung memory :D w00t
and it looks much better around the socket now plus look at those phase :D:D:D:D:D
I picked up a gigabyte 8800GT with 1ns samsung memory :D
(Voltmods coming soon)
oh rly simon :shocked:
maybe time to send an email hahahah lol
if no luck maybe get Gigabyte card instead
i like GB's quality on all products :)
I found Vgpu, Vdimm, Vdroop mods (Gigabyte had already done the OCP mod for me :D)
There are also 4 more voltages that are controlled off a quad op amp which i have no idea what they are for. When i test these mods ill get some voltage readings, maybe it could be worth modding them as well :confused:
(Pics up hopefully tomorrow)
As promised, here are some shots of my modded Galaxy 8800GT w/ Thermaltake HSF. I know the quality of work is not that good - I just like to mod and didn't manage to think of how to make it look nice as yet :D
http://planet.time.net.my/klcc/alvinn1/galaxy/mod-1.jpg
http://planet.time.net.my/klcc/alvinn1/galaxy/mod-2.jpg
http://planet.time.net.my/klcc/alvinn1/galaxy/mod-3.jpg
http://planet.time.net.my/klcc/alvinn1/galaxy/mod-4.jpg
http://planet.time.net.my/klcc/alvinn1/galaxy/mod-5.jpg
http://planet.time.net.my/klcc/alvin...axy/3dmark.jpg
What voltages and speeds do you get with this card right now?
My vMem is at 2.15V and I'm doing 760/1910/1200
More vGPU and I'd like to hit 800/2000 for Core/Shaders hopefully :D
I am just going to go cry for a couple years F!#(^$#@ quimoda chips suck!!! 1k stable and no more... 1023 for benching... :(
Nice mem clocks though :)
I have to thank HitandRun and Largon for the mods really :) It's now the vGPU mod and hopefully to push the core/shaders a bit more.
OK guys this mod is only for the GALAXY 8800GT PCB model. I soldered the wire straight to the pin @ 22 (FB) on the L6713A phase controller! The resistance to ground was 2492 ohm so I choose a 50kOhm VR to do the mod. See the pictures below.
http://www.cyberimpressions.net/out....402_PWMbig.jpg
http://www.cyberimpressions.net/out....403_L6713A.jpg
Here are additional spots to solder on if you don't feel comfortable doing it straight to the IC.
http://www.cyberimpressions.net/out....04_VmemBig.jpg
My OC is 810/1800 @ 1.35V idle. At this settings I can run AM3 and 3Dmark06 loops forever. The voltage will top out beyond the 1.4V mark a lot without any problems. Now, the problem is that something is still shutting me down when I try to add more voltage but I'm not sure if its OCP since my screen just freezes and the voltage is not dropping out to zero. Now I'll need some help from the PROS! :D Let me know what you guys think!
Holy cow, we now have a vGPU mod :D Thanks HitandRun and I'd definitely try it out soon.
Same thing happening to me, it's driving me crazy, ...Quote:
Originally Posted by HitandRun
First, any voltage over 1.2v makes the screen go black (monitor enters suspend mode) and the voltage drop to zero. I'll try to do the OCP Mod today and see what happens with this problem.
Second, even at stock speed games freeze randomly, BUT, if i press ALT+Tab it takes like 20 seconds and unlocks to return to the desktop, if i return to the game it freezes again and takes longer if i try to ALT+Tab again, it's so weird and driving me crazy, cause most of the time i don't know whether it's from the o/c or something else!
Thanks.
Are you on a Galaxy card or it's a reference board?Quote:
Originally Posted by os008
Quote:
Originally Posted by HitandRun
Btw, where is the ground point which I can use near to the IC (pin22)?
ReferenceQuote:
Originally Posted by aoch88
Keep in mind this is all on your own risk! As you know from reading above I'm still fighting some kind of freezing which is not temp. related since this card never goes over 50C on full load.Quote:
Originally Posted by aoch88
Well, its not the same thing happening since my card never goes blank and drops the voltage! It just freezes. You need the OCP mod. Its cutting you off!Quote:
Originally Posted by os008
There you go! Some grounds for you!Quote:
Originally Posted by aoch88
http://www.cyberimpressions.net/out....05_VmemBig.jpg
I don't have SMRs right now, but tried to Pencil Mod it, and seems to have worked i think. Passed 1.4v on load but it didn't cut off, need more testing though, i just did a quick test.Quote:
Originally Posted by HitandRun
As for the freezing ... i have that too ...
Did you try to ALT+Tab?Quote:
Originally Posted by os008
Pencil modding seems a little dangerous as you want the resistance across both SMC's to be equal.Quote:
Originally Posted by os008
Oh, good point, i'll shutdown and measure the resistance ASAP. it should be 1.4K Ohm, right?
Thanks and yup, I do understand I'm on my own but at least you did it on yours and sure that it works :) If it doesn't work well, I'll just remove the mod by unsoldering. Btw, what resistance do I have to put to get around 1.35V? I'm just thinking if a 20K VR pot woudl work.Quote:
Originally Posted by HitandRun
if he is using a 2492 ohm resistance, and a 50k 25 turn pot, then you should get higher precision with a 20k 25 turn. Even better would be a 5K.
I believe it's 1.29k Ohms stock, and you'll want to end up somewhere around 985-650 Ohms. The lower you go on that scale the more OCP headroom you'll have, but you'll also tax the load-balancing the lower you go.Quote:
Originally Posted by os008
Don't know exactly but 50K got me booted up just below 1.3V so I think 20K will give you a little more than 1.35V. You got a good cooling so I would not worry about it! Just boot up and see what happens. I can't trip the OVP on this card even when I run this thing far beyond 1.4V but the OCP comes into play! More testing follows.Quote:
Originally Posted by aoch88
Why does that galaxy use 2 six PCIE power connectors?
A sneak preview:
http://i30.photobucket.com/albums/c3...s/PICT5253.jpg
I modded every voltage i could find, ill post an update after i test it.
I tried looking at the IC and man, the legs are surely small :yepp: I have a soldering gun which has a bad tip so I have no confidence in doing it until I get a proper one.Quote:
Originally Posted by HitandRun
Anyway, there isn't anywhere else which we can solder? :(
I think Galaxy claimed that the 3 phase power needed extra juice compared to the 2 phase PCB design. I might be wrong on this one!Quote:
Originally Posted by Demo
This is INSANE! I love it! Which PCB design is this and which power regulator is on this card?Quote:
Originally Posted by oohms
YES! Look at the picture in my post above! I showed 3 different places where you can solder to on the backside of the card. :up:Quote:
Originally Posted by aoch88
Ok, I think I got confused :D The 3 spots are the alternatives and I can just solder there with another wire to ground? Why did you chose soldering on the IC anyway? :D It's so difficult and tiny.Quote:
Originally Posted by HitandRun
oohms what are those other spots you modded. I see the Vmem and Vcore mod, but what are the others for/or control???
Hey! Tried the volt-mod on my 8800GT today. But first, could you look at the picture added below; what is that thing? A capacitor?
2bb1,
You mean this one? It's a resistor.
Attachment 73729
Why?
Hey guys, im going to need some help with this one. Basically i found a number of mosfets on the board whose output voltage i can adjust. But 3 voltages are unknown to me:
red 1.10v Vcore
brown 2.00v Vdimm
yellow 1.79v Tiny mosfet
blue 5.05v Large mosfet (Looks like 5V supply)
green 2.44v Large mosfet, near front of card
gray 1.18v Large mosfet
Quote:
Originally Posted by aoch88
Yes the 3 spots are alternatives where you can solder onto! I had to solder to the pin on the IC because nobody knew where the pin # 22 tracing goes to and it is not possible to put your meter lead to the pin on the IC and look for another spot on the backside of the card to solder to. With the wire soldered to the pin it was much easier to find alternative soldering places for the mod. Let me know how it works out for you as I’m fighting the freezing on my card. I talked to Largon (BIG THANKS TO HIM FOR SUPPORT) and he says that the freezing is not OVP or OCP so I’ll have to sort it out on my own. I won’t have too much time during this weekend to test as I’m testing my new Giga EX38 board but next week I’ll be back on the game.
oohms,
DVI uses 5V on some pins, 1.79v could be vDDQ since yours is a non-reference card. 2.44v might be there for s-video signal source. No idea about the "1.18v" though...
Thanks!Quote:
Originally Posted by largon
Maybe 1.18v is Vref for the gddr3?
Yes that one!Quote:
Originally Posted by largon
It fell off while I were modding. So I "cancelled" the vmod to check if the card were still working; and it does. How can this be if I've removed a resistor? Can it be this way, or should i "mount" it back on?
Ok i found out a few things today.. (went and downloaded the datasheet for the samsung ram it uses)
- Vdd = Vddq (Damn cheapskates :( )
- Vref is controlled by a voltage dividor as such:
http://i30.photobucket.com/albums/c3...t/88gtvref.jpg
Now im just clarifying, i reduce the resistor between Vref and Vdd to increase Vref right?
(The only bad thing about this is that each chip has 2 separate Vref points, so 16 modifications in total :eek: )
edit: as it is, that will provide Vref = 51% of Vddq, instead of 70% of Vddq
Im interested in a vGPU mod on a Palit 8800GB 1gb edition, does anyone know to do it? pref the mods that i can make trace lines via conductive ink and place the VR there instead of soldering directly to the IC
I'm just dropping in again. I'm going to be modding mine again, first time ended badly... and well the 3 pin looks like it's a little safer :)
Are you trying to isolate the memory voltage from the memory controller voltage? I was told that wasn't possible, but if you get it working I'm very interested to try it!Quote:
Originally Posted by oohms
This would, at least in theory provide higher memory clocks correct? Because the memory controller wouldn't be overvolted, but the memory could attain more voltage for higher clocks, at least for the quimoda?Quote:
Originally Posted by jason4207
Also does anyone have a looser memory timings bios that they could give me?
My Palit 8800GT is using 3phase and only has 1 PCIe power connector though.Quote:
Originally Posted by HitandRun
Quote:
Originally Posted by Demo
Heres my 8800GT 1Gb Palit brand, where do i solder for a vGPU mod ?
Got my 88800gt back from rma, stress tested it stock and the stock mem 950mhz was stable! So I out on my water block and modded it up. I set it to 1.5v and 1.84vmem like my other card and boot up w/sli bridge in. I get into xp and make sure all my rivatuner overclock stuff is off. Then I open the nvidia control panel and click enable sli. Screen goes black and pc immediatly restarts. I load up xp again and do the same thing, it restarts again, this time won't get past xp loading screen. I unmod the Vmem buck and take my other 8800gt out and put this one in the default slot. I turn it on and I get white and green boxes everywhere that move in post screen. It looks like heavy artifacting, but it has to be stock clocks, because i did not mod bios and I took my Vmem buck mod off, so It is completly stock... Maybe tomorrow I'll take the Vcore mod off and try it, but I doubt that will fix it, but i'll give it a shot. In the mean time anyone have any ideas????
Quote:
Originally Posted by jason4207
It would be great if someone could figure out the memory controller thing.Quote:
Originally Posted by scottc19
Also, is there any benefit from loosening the memory timings?
http://www.xtremesystems.org/forums/...&postcount=532Quote:
Originally Posted by Demo
Vref is the voltage which is used by the ram to determine if a signal is 1 (high) or 0 (low).Quote:
Originally Posted by jason4207
Usually this is about half of Vdimm, but the GDDR3 specs and the samsung datasheets say that it should be 70% of Vdimm. Its actually 51% of Vdimm, so hopefully soon ill change it to 70% and see how it affects my ram overclocks.
I haven't looked into the memory control voltage, since there isn't much info about it. At least one of the unknown voltages is used by the GPU though, so ill try adjusting them to see if it affects my OC.
Did you measure the voltages when this happened? You also might have accidentally knocked a small component off it, has happened to me beforeQuote:
Originally Posted by scottc19
I can't specifically diagnose your problem, but hopefully it'll work fine after you remove or at least turn down vGPU.Quote:
Originally Posted by scottc19
I wanted to comment on your vmem mod, though. 1.84v may be ideal for 1 card, but it varies from cad to card, so you need to do some testing. My first card liked 1.84v, but the 2nd one only liked 1.8v.
Can anyone tell me if it's OK that the resistor is gone? :confused:Quote:
Originally Posted by 2bb1
There you go.Quote:
Originally Posted by Demo
http://img219.imageshack.us/img219/1...lgo2rr3.th.jpg
Thank you!
I took all the mods off the card and tripple checked that all the components were there... It looks exactly like stock, I even compared it to my other card. yet it still has the same problem... This card just died somehow ><
Maybe my motherboard fried it somehow with the other slot?
I think it depends, the card might work fine, but there might be a voltage increase because of removing that resistor, or a decreased functionality that won't appear till you do something specific, or just a general instability!Quote:
Originally Posted by 2bb1
You should consider replacing it though. Someone here could give you better advice.
someone PM'ed me on penciling the area, would it also work ?
My base overclock is limited to 720/1728/900
should i bother doing the vGPU mod ?
http://img181.imageshack.us/img181/6...6056918gw8.jpg
Quote:
Originally Posted by scottc19
Did you try to put the stock cooler back on, some cards are very sensitive to mounting pressure and they artifact like crazy even if the card isnt warped.
Demo,
That would be the correct place to pencil for higher vGPU.
I put it back on, and it still has the problem, it looked slightly differnt, but still doesnt workQuote:
Originally Posted by Demo
Thanks, with my base overclocks of 720/1728 , with such a low base of overclocking do you think it is still worth a volt mod ?Quote:
Originally Posted by largon
Well now I am over 2200 shader.
http://www.cyberimpressions.net/imag...smarkXPVM6.jpg
http://www.cyberimpressions.net/imag...9_FurXPVM1.JPG
http://www.cyberimpressions.net/imag...Mark0615k2.jpg
Seems to have more of an impact once you max out the core clock. The shader will keep going for a bit. I will try for more later.
DEMO where would the mounting pessure affect it? on the core?
Nice scores on that card! One thing I noticed is that you don’t gain too much going over 800Mhz anyway! I scored almost 16K (3dMark06) running the card at 780/1800/2200 and the CPU at 3.8G. Any more GPU OC would not give me better scores!Quote:
Originally Posted by Renegade5399
probably becuase the thing holding you back was the mem clock of the cardQuote:
Originally Posted by HitandRun
LOD = ? :)Quote:
Originally Posted by HitandRun
Yes on the core, mine is extremely sensitive to pressures to the point that its very unbelievable.Quote:
Originally Posted by scottc19
nice clocks but dont run fur benchmark. some people ran it at higher voltages when modded and it fried there card. just warning you before hand if you run high voltage. you can still run it i just recommend not running it i hate seeing hardware burn up. just my 2 centsQuote:
Originally Posted by Renegade5399
So I take it 1.2 Kohm resistors for the 8800 OCP mod is to low ?
I belive on guy here lost is card because he went to low ?
It is a while ago I read the thread and had given up on my card.
1.2k isn't too low, but there is no reason to go that low unless you are trying for some serious clocks w/ major voltage under DI/LN2. ~4k is better suited to air/water.
The guy that lost his card had removed an SMR. Thus removing the circuit that detects OCP, and also making it difficult for the card to balance the load b/n the MOSFETS. One MOSFET received too much current, and blew up!
And here's why. I am set for ~1.45v load. Every bench runs around that. Lightsmark will hit about 1.475v. But FUR on the other hand spikes the card over 1.52v. This is probably why people's cards are dieing. Mine is water cooled and never breaks 38°C loaded. I have sinks on everything the stock cooler touched, plus a couple other components I found to be hot.Quote:
Originally Posted by natedog420
I used 2.2k ohm 1/4 watt resistors from Radioshack. Soldered wire leads on them and soldered the leads to the surface mount caps on the board.Quote:
Originally Posted by Nosfer@tu
I also applied a voltmod to my 512mb 8800gt (sparkle).
Works fine, I set the card to 1,25V IDLE which results in ~1,23V LOAD.
With these voltages i can reach around 770mhz gpu clock
But my problem is, the card gets really hot. I don't mean the GPU, it doesn't exceed 50°C LOAD (I use the accellero S1).
No i mean the other "parts" of the card.
especially these ones:
http://img183.imageshack.us/img183/2023/hotau8.jpg
I can't even touch them...The area around these (commutators?) is very warm too.
Is this normal? Because i don't wanna fry my card in the next days..
I only set it to 1,25V IDLE because I thought it should be still safe isn't it?
And another thing i recognized- after doing the mod some parts of my card do strange sounds- like a summing/humming
you will get some humming if you will if you run more voltage. get some heatsinks over them with a fan. i put heatsinks on everything on my card. remember most things perform better when there operating in cooler temps than hotter temps.
Before the volt mod, how what were your max core/shader clocks ?Quote:
Originally Posted by Heinzkopf
With Standard 1.05V BIOS I only could reach 640GPU. With 1.10V 680GPU/1700Shader was max.Quote:
Originally Posted by Demo
But I lowered the voltage now. I don't want to risk killing my card. Now it is around 1.15V which results in 720GPU. Thats enough for me and i think I can let the card work without extra cooling from the back.
Heinzkopf,
That's perfectly normal, those components are mosfets that convert vGPU and vMEM voltages so it's normal they get hot especially when voltmodded and overclocked. All you can do is sink 'n' fan 'em.
The buzzing sound gets the stronger the higher your card OCs. Most likely it's caused by the encased vGPU inductors (big block-like components) on the frontside of the card. It's not dangerous at all.
Mine is at 1.15v default. im also getting 720/1728Quote:
Originally Posted by Heinzkopf
What place?:confused: the marked 2 red points on this pic?:confused:Quote:
Originally Posted by largon
http://img181.imageshack.us/img181/6...6056918gw8.jpg
Is this going to work on my Asus EN8800GTS 512MB g92?
And are there any other pencil mods(except the video RAM mod, which made no difference in my case) that could be applied on it?
My card is a 1Gb model, i think we have a different PCB.
is it a GTS or a GT?