It's the same principle as for G80GTS:
This pic is of a GT so there's no SMD for 3rd phase...
http://img228.imageshack.us/img228/603/g92ocpyz8.jpg
Printable View
It's the same principle as for G80GTS:
This pic is of a GT so there's no SMD for 3rd phase...
http://img228.imageshack.us/img228/603/g92ocpyz8.jpg
:mad: I didnt super glue any wires i super glues the 1k on the side and the steel pin on the 1k was touching the spot where to solder, anyway i re did it and solder it and still the same problem, and im getting freezes all the time in crysis that i have to reboot,
What power supplys does everyone have, cuz i had to when i did the volt mod i could smell my powersupply burning, so i had an extra one around but i didnt like it cuz some reason my wiress mouse doesnt work as good, could be alack of power in my computer? +3.3v@36watt,+55 36A, two rails at 19A and the other 20A and the max is 585, i have 2 harddrives, 1 dvd, 5 fans, 2x2gb@1052@2.3v and e4300@3550@1.535,680 xfx lite board, and the bfg2 830/2000/1080, could it be freezein cuz the lack of power?
http://shrani.si/t/2X/A4/35lV7yAi/90...60-shaders.jpg
Idle 1.33V
Load 1.38V
:up:
Funny as in with the 256bus and memory Qimonda will act up and the shader will start erroring with Squares....Not pixels....After you run it enuff and get a pixeling ( this means the memory cant hadle the OC...) Lines on the screen and its usually all over ,It will slowly get worse....2300mhz on water is good but the Qimonda cant handle it for to long even when the card dosnt go above 41c @ 2250//2300mhz..Im still testing this and after a while i can get the memory to fail @ 2300mhz but not 2250mhz. The Max 2250mhz is common for this series of Qimonda ..Dosnt matter how high a GPU//Shader speed this seems to be the Max Safe limit before memory burn out:yepp: ...
Ive seen that Samsung is finaly working its way onto GTS512's...I may buy afew with some friends this weekend and see if this is true...If it is ,,it will be by far a better stable Oc using Samsung memory @1.0ns@2300..It will be far more stable than the qimonda...people with some new Gt's are already doing 2300mhz with the new samsung...Some have posted at [H] and here too in the GT section..
Keep us updated mate cos ill jump out and grab some straight away
My card, running on LN2 at -80C to -100C, will top out at 1.505V idle (approx 1.6V max load) with clocks @ approx 1130.
This votlage was the same max for DICE, and is very clearly triggering OCP/OVP
1130...on the core?
So you're not sure exactly when OCP kicks in, but it's definitely getting in your way?
For us guys on air or water cooling looking for 24/7 clocks I think the OCP is irrelevant, but for extreme cooling it looks like the mod definitely has it's place. :up:
OCP definately kicks in for me on GT2 every time when above 1.505v set idle (~1.6V load)
http://img.photobucket.com/albums/v310/T_M/22586.jpg
shame you don't have a 5.6 quad
Black screen restart
I wasnt game to ask a complicated question like that , so Im glad you did .
:D
No...
Accelero@850Mhz temp. 55c on Crysis
Water@900MHz 1.33V (Idle) temp. 43c on Cryisis, 940MHz 1.45V (Idle) temp. 44c AtiTool
hello , can i use any other value for the gt card exept 1.2k? tnx yiangos:)
I was told to use 3.8-4.2k. I think lower R values will raise OCP detection even higher, and might be necessary if you plan on going DI/LN2, but for water/air I think 3.8-4.2k is probably best.
Hopefully, someone w/ more 1st hand knowledge can chime in, and correct me if I'm wrong.
T_M - WOW! :eek: Nice clocks man! :clap: I knew going cold would yield better results, but that is more than I was expecting. Too bad the vRAM doesn't like to play like that!
electrician gurus help the noooobs :D
Thanks for your contributions John
last question m8s :P in how meny volts the gpu + ram dies? i am planing Dry ice so i have to know ... thnx yiangos :)
I got my Gigabyte 8800 gts card this week, i think i will be hapy with it abit low gpu mhz but the shaders and mems are good :)
Stock fan 100% and no vmodd yet.
3DMark2006:
http://service.futuremark.com/compare?3dm06=4724788
Core:783,Shader:2052,Mem:2214
To bad my cpu holding back the scores abit..
What mem does the GTS cards have?
Backing down on shaders might help you to get higher core clocks.
GTS uses 1.0ns Qimonda but perhaps the latest have Samsung memory, i know the latest 8800GT have.
Are you gonna Vmod yours?
Lower shaders clocks didnt help my core clocks. Are it anyway to see what memory are used on the card without removing the fan?, i´m thinking about doing the vmodd....its looks abit tricky becuse the stuff is so small and i dont think my gain of the mod will not be so much, becuse my cpu is holding my stuff back.
The memory mod looks much easyer but i dont think it will be any gain in clocks if its not are samsung chips.
How much is max voltage for 24/7?
900/2130/1090 1.36V idle is this to much? Max temp. on water is 46C.
I`ve got also a Gigabyte 8800GTS..:-( and max.Core is 856...
vMod
http://images27.fotosik.pl/143/f41af5c579ad943a.jpg
vGPU:1,4v idle, vMem:2,03v..and max.Core:856/Shaders:2079/Memory:1104V
3Dmark06..17,484
http://images23.fotosik.pl/143/1908da88a5cf4c09m.jpg
temp.38`C idle, max.47`C load on wc
http://images29.fotosik.pl/144/b190c9aeab82eaee.jpg
Gigabyte 8800gts g92 bring qimonda mem's
..a regular lamp and tripod, I always make use of time switch on camera for these pictures...
that is rather well :)
a new max. 875/1100(2200)/2125 vgpu:1,45(idle) max load temp.47c on my old wc
http://www.fotosik.pl/pokaz_obrazek/...eab82eaee.html
3Dmark06 17669
Yans mods suggest removing the 78X resistors to deal with OCP. I'd be happier adding in resistors in parallel. 2K ohm would probs do it to give a higher current ceiling?
Is OVP dealt with separately?
Im prepping for dice (finally) and dont want voltage limits- only silicon and cooling limits :p:
who can I ask for the lower vmem mod? thank you
my bfg can't go higher than 1060x2 (2120) in atitool. Is it normal? 1100 crashes everywhere..
welcome to XS :) Very few people are getting 1100 stable for 24/7 or gaming, your clocks are pretty much maxxed.
What voltage is your GDDR getting?
currently I am at stock cooling. The gpu is 780 2k6 stable and 760(756) atitool stable with fan@70%.
The card is stock voltage. mem with tester os 2.05, tryed simple pencil mod and obviously More problems and less frequencies due to the vddq. so now all stock.
will mod card soon and place on it a mcw60 + sinks.
cheers mate:)
Update....i think this is max with indoor temp 23c
http://service.futuremark.com/compare?3dm06=4833220
Opty 165 @ 3017,50mhz 2x512Mb bh5 @ 274,32mhz 2-2-2-5 T1
Gigabyte 8800GTS @ 846,2214,1134(2268) 1.375v idle Stock fan @ 100%
The gpu core is very hard to get any higher...and thats with more vgpu, i can run with 1.317v also @ 846mhz but more vgpu dont give any more clocks...so i think the heat is the problem. But the shader did go up abit with more vgpu.
I wouldn't say I'm 24/7 stable at 1100 but it benches and games OK. Will see how far I can get it once its liquified.
Set up is below:
http://farm3.static.flickr.com/2242/...9cdd9b2e_o.jpg
who can I ask for the lower vmem mod? thank you
K404, i will not be trying to removal of resistors mod, instead will try the soldering in parallel method because of what VJ has said.
Have you been getting your 1100MHz+ core clocks with OVP and OCP limits still in place? :eek:
Yes, i have not modded for OVP/OCP yet.
Those clocks were achieved with 1.505V idle, and between -70 to -100C
There is a BIOS VMod per this video card? :confused:
FYI: I've posted some pics of both my GT, and GTS mods in the 8800GT thread if anyone is interested.
twintek 8800gts vgpu moded (memory default) samsung ics. Voltage 1.43v idle - 1.46-1.48 load
Watercooled by mcw60.
And for 24/7 use 1.2v. Excellent card :)
Awesome George , can do show us a run of 3D06 too please ?
:up:
For 24/7 1.36V
http://shrani.si/f/q/38/2VL3XB5q/untitled.jpg
Bench 930/2200/1100...06
http://shrani.si/f/1n/5U/4lIF3e12/1/18484-06.jpg
Considering I don't have a multimeter.. I will be buying normal (non-variable) resistors for this mod. What should I be buying? I have stock cooling at 100%
oh god what memories do you have? 2400mhz???
So I did the mod on my 8800GTS 512. I also did 2 modifications on my motherboard (added tantalum caps in parallel and a vdroop mod) After installing everything I turn it on to find just a black screen (I also didnt hear any post beep) I thought it was OVP so I broke out my multimeter, GPU was at 1.4v and mem could not go below 2.35v no matter how much I turned the trimmer (I know the trimmer wasent at its limit, it wasent clicking) So I unsoldered the vmem mod and the mem then measured 2.1v. Still a black screen, So I unsoldered the vdroop mod, still a black screen. I didnt unsolder the caps yet (they are on the back of the board and would take a while to get everything out of my case) I know for sure that the polarity is correct on the caps, so polarity isnt the problem.
What could it be? I will be testing another GPU(unmodded) this weekend to see if its the board or the GPU. Also one other thing that may be helpful is that during the voltmod I ripped the + trace off of the pcb (the one for the vgpu mod, right below the primarion chip) but I saw that the trace led directly to the resistor right below it so I just soldered it to that. Is that ok or could that be causing the problem?
Thanks for reading and thanks for any help
2.35v? What size VR did you use? Did you measure Ohms before soldering it in place? Increasing vmem has been shown to do nothing. Decreasing vmem is actually better... at least on the Qimonda chips. Have you read the whole thread yet?
If you managed to rip a trace off you may have been too heavy handed w/ the soldering iron. There's a chance your gfx card is fine since it may be your Mobo at fault, but you may have damaged lower PCB layers. How long did you hold the tip on the PCB, and what kind of iron do you have? Do you have any pics of the gfx card in question?
A 50kohm vr for mem was used as directed. No I didnt measure them before I put them on, stupid me always forgetting things, but luckily they were within acceptable ranges (gpu was at 1.45v and mem at 2.4-2.5v I think, nothing that should have killed the card) And I know lower vmem is better, the problem is that it wont let me adjust to any value lower than 2.35v. And yes, ive read just about every page of this thread. I am 99% certain that there is no damage done by ripping the pad off (it was just the tiny pad, it didnt take any traces with it when it ripped off) The iron is a 25-30w radioshack iron, tip is too big for mods, but I manage. There is no solder touching anything that it shouldnt be, its not bridging contacts or anything like that. I try to keep the iron on the pcb for the shortest amount of time possible and I do have pictures but lost my cable for my camera and wont be able to put up pics until I find that. Thanks
This is after Vmod:
http://www.pctunerup.com/up/results/...064050Vmod.JPG
vga work fine @ 870mhz with 1,35V but for 890mhz it need 1,45V full load and over 900mhz it's very very unstable.
I traied also with 1,55V but I saw only reboot. :(
Cooled @ liquid and temp never over 42°C full load.
What can I do for bench @ 930-950mhz? DICE or LN2? lol
LuckyX2,
Just ripping the pad of doesn't mean anything is hurt, but I just worry that if you had enough heat & pressure in there long enough for the pad to come off then perhaps you did some damage to underlying layers. Hopefully everything is fine, and your Mobo just isn't liking it's mod. I'm hoping that if you undo those mods that everything will work again.
I'm sure the memory could take 2.35v, but I know the memory controller doesn't like the extra voltage too much. They share the same voltage line. I have no idea if it's possible to kill the memory controller or not w/ too much voltage, but I know it doesn't respond well to even 2.0v.
Somethign sounds wrong to me if you used a 50k VR for vMEM and get 2.35V minimum. WIthout the mod what is your resistance from the leg to ground?
Why there isn't a vmod via bios for this card? :'( This mod is impossible????
Well,having a great Twintech card here on air.Looking after v-mod for 900/2200/2200 for 24/7 considering that without a v-mod i am stable at 820/2000/2200 and 840 for benching. And yes it does have Samsung memory :D
http://forum.crazypc.ro/attachment.p...6&d=1201826049
Wonder if we could decouple VDDQ from VMEM..
Okay I vgpu modded my XFX 8800GTS Alpha Dog. I don't have water cooling, so my fan's set to 100%. My memory I left stock, and I measured it at 2.0v the vgpu sits at 1.195v idle and 1.235 load when the 500ohm VR's set to it's highest position. I'm able to go up to 820 core 2000 mem and 1900 shader and it's 30minutes ATItool artifact scan stable with the temps going up to 57C. Now I know it seems high, but I'm sitting with 28C to 33C ambient temps, and no not the ambient measured by the card, I mean the temperature measured by a thermometer inside the house. When benching I'm able to run all 3D Benchmarks at 880 core, 2100 memory and 2100 shader with the idle vgpu at 1.370V and 1.425 under load and the temps up to 64C.
Q6600 @ 515 x 7
Crucial Ballistix Tracers 617mhz 5 5 5 5 T2
XFX 8800 GTS 512 – core 880 – mem – 1050 – shader – 2100
ASUS P5K Deluxe
3DMark01se – 70793
3DMark05 – 23519
http://img337.imageshack.us/img337/3...707kzo1.th.jpg http://img151.imageshack.us/img151/4...235kjm9.th.jpg
Q6600 @ 450 x 8
2 x 1GB Crucial B Tracers 562.5mhz 4 4 4 6 T2
XFX 8800GTS 512 – Core 880 – Mem 1050 – 2100 Shader
ASUS P5K Deluxe
3DMark06 - 17382
3DMark03 – 50225
http://img179.imageshack.us/img179/5...738kzy5.th.jpghttp://img251.imageshack.us/img251/7...350kvp8.th.jpg
Guys , have the Samsung chipped cards emerged yet ? Can you tell which has samsung ?
:up:
I have find this vmod....
Awesome! You've got a good start. Let's just hope it scales well. If you decide to play w/ the memory voltage, please let me know if those Samsung chips responds better to higher or lower voltage.
I asked Viper about this, and he seemed to think it wasn't possible. I really hope he's wrong, though!
How did you get your FSB so high (515) w/ the quad? Just a good chip?
Let me know if it works. From what I understand a BIOS mod won't work. The GT had a mod b/c there were 4 VID values assigned (0-3), and only the 3rd VID (2) was selected in the stock BIOS. By selecting the 4th (and highest) VID (3) you were able to get 0.05v extra...no more. With the GTS the highest VID is already selected, so there is no way to select a higher one.
I just looked at the BIOS file, and I'm sure it won't work. All they did was change the label for the VID (I tried this on the GT as well before I understood more about how it works). VID3 is still seen as 1.15v by the chip even if you change the label to 1.35v. VID3=1.15v; you can call it whatever you want, but that fact doesn't change.
Hey Jason, I think I was just lucky with the chip, meaning good chip. But its 515fsb with only two cores. Can go up to 525 but air cooling holding me back.
STEvil,
One would have to desolder all RAM chips and cut the connections between vDD and vDDQ solder pads. Then build vDDQ it's own power regulation circuit.
->
Impossible.
Thanks for the help, I have a Modded 8800 and a stock 8800 the both read .6ohms resistance from the leg to ground.
And I dont think the problem was my 8800, after trying a differnt gpu/ram/psu I concluded it mas my board.
Here's some pics of my 8800 GTS 512
http://i16.photobucket.com/albums/b1...h_DSCF1269.jpg
http://i16.photobucket.com/albums/b1...h_DSCF1266.jpg
http://i16.photobucket.com/albums/b1...h_DSCF1257.jpg
http://i16.photobucket.com/albums/b1...h_DSCF1256.jpg
http://i16.photobucket.com/albums/b1...h_DSCF1237.jpg
So in summary -
Buy a 500ohm VR instead of a 1K ohm?
Is the 50K OK? Or lower?
I don't get why we need a 50K VR when we are only potentially setting it to around ~600ohms anyways, why not just get a 1K VR here. Same with the 1VR, why not just get a 250ohm? Makes no sense, unless I'm wrong (which I probably am)
maxwolfie,
500Ω and 20kΩ VRs are fine for vGPU and vMEM mods respectively.
Infact, we are not setting the 50kΩ VR in the vMEM mod to anywhere near 600Ω at all. We're using the 50kΩ VR to set the whole circuit to ~600Ω. The catch with the high rated VRs is that the added VR and the preinstalled SMD resistors are installed in parallel thus resulting in a bit different combined resistance than either components separately.
1. I have also purchased these resistors - Please confirm that the photo there is actually a G92 and not a G80? Or at least confirm that it won't bugger my G92 if I try it? I'm only running the stock fan anyways so I might not even NEED to do these mods. I've read that it's only necessary for big vgpu increases
2. Is that the OCP or OVP mod?
3. Also, can I use normal resistors instead of SMD resistors, as my elec store did not have SMD (only capacitors)
4. One more thing, in regards to the actual vgpu/vmem mods - There are a couple of different types of VR's available - 20KOHM MULTITURN CERMET TRIMPOT, 20KOHM SPECTROL 25 TURN TRIMPOT and the open carbon type which I have purchased but are almost IMPOSSIBLE to adjust without going waaaay past the desired value! Hence me searching for 500 ohm and 20k ohm VR's instead
Ok, I will stick with the 500ohm and the 50Kohm instead, as per your original instructions
Cheers
Switches for the mods are good, but only switch on the mods with the system off or else you will likely trip some safety in the video card that protects against rapid voltage increases, and the system will reset.
Righto, mod failed. I don't have the stable hand or a decent enough soldering iron to be doing such intricate work
*sigh*
Are any of the points able to be accessed on the other side of the PCB? Especially the tiny solder point for the vgpu. I've taken all the solder off it now, so I have no chance.
The pic is of a G92GT but it applies also to G92GTS but wit a third SMR.That's OCP. There is not OVP mod for any G92 based boards (afaik).Quote:
2. Is that the OCP or OVP mod?
BUT!
OCP shouldn't be a problem for G92GTS as it has (atleast) 3 phases. G92GT on the other hand could gain from OCP mod as vGPU is just 2 phase thus the phases peak above the trip-point easier.Yes.Quote:
3. Also, can I use normal resistors instead of SMD resistors, as my elec store did not have SMD (only capacitors)
I can atleast confirm that both Cermets and Spectrols are ideal for any vMods (I personally prefer Spectrols). Sounds like you're tuning the resistor BEFORE you solder it in.Quote:
4. One more thing, in regards to the actual vgpu/vmem mods - There are a couple of different types of VR's available - 20KOHM MULTITURN CERMET TRIMPOT, 20KOHM SPECTROL 25 TURN TRIMPOT and the open carbon type which I have purchased but are almost IMPOSSIBLE to adjust without going waaaay past the desired value! Hence me searching for 500 ohm and 20k ohm VR's instead
WRONG! Don't do that.
Tuning the VR before soldering can possibly destroy the card (if you don't know what you're doing). Always set the VR the max value before soldering (unless directed otherwise). You are supposed to tune it AFTER it is soldered.
I explained why this is important earlier in post #286. There are no optional soldering points other than those depicted in G92GT vmod guide pic.
Excellent, at least I understand now
Cheers :)
you guys must have pretty steady hands :P
For small detail soldering i always steady the iron with two hands and both elbows on table, and even then i still shake a bit
i just use adhesive conductive paint like so: http://www.xtremesystems.org/forums/...ghlight=ghetto
worked fine on my 8800gts512 using 500ohm multi turn vr set to maximum resistence initially
Hi,
recieved my 8800GTS today, but i just have some 200ohm VRs left! Will they work too for Vgpu? Thanks in advance.