In the picture I see a Vmem mod but no Vcore mod, so I'm assuming there isn't out one yet for the pencil?
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In the picture I see a Vmem mod but no Vcore mod, so I'm assuming there isn't out one yet for the pencil?
i sold my card, the core overclocks well but i think the design of the card is too weak to sustain high voltage and overclocks for long periods of time,
i read that there are new galaxy and palit 8800gt with 3 phase power, i will be hunting for one of those and hope it comes with better ram, should be interesting
Only vgpu mod @ 1,22v and on water.
http://xs121.xs.to/xs121/07456/84213.jpg
Thx for the mods guys, I'm ready to testing :D
Any chance we an get bigger and closer pics?Quote:
Originally Posted by Achill3uS
I wanna see your connection :)
*Sweet Achill3uS!
This is gonna be one hectic weekend
Doe's anybody know what max safe 24/7 voltage is on these cards?
I got mine in yesterday and the volt mod went smoothly but I have no idea what's safe for 24/7 use. I've had the card clocked as high as 900/2000/2000 bench stable but it took 1.4v to do it. I'm currently running it at 875/2000/2000 @ 1.28v, still in the process of testing the shaders and memory though.
Thx mate :) i edited the pic, will upload better for you! btw tomorrow I will test the card outside with my 6850 under DI, and next week my gpu pot will finished and after the FUN begins :DQuote:
Originally Posted by Hazaro
Link/picture not showing to me. Did you just remove it? (Or pm me)Quote:
Originally Posted by Achill3uS
*A DI run... shame you don't have a quad to pump your benches!
Would anyone post the resistances to get the 1.22v and 1.4v please?
Anyone try the pencil mods????? for the vcore??? i dont wanna be the test dummy LOL
ok, so i tried that pencil mod, and it didnt work, nothing happened.....did both resistors and temps and overclock stayed the same...........
Thanks guys, for not slapping me silly for missing those 3 glaring post about the max voltage applyable to these cards.:rolleyes:
Just in case anybody else missed it 1.4v on the core should be safe but caution is advised.:up:
What is stopping you from putting 1.4V in the BIOS? The chip?Quote:
Originally Posted by JKDC
http://www.vr-zone.com/articles/Gala...ower/5387.html
Any news on how this will volt mod?
Renegade5399,
Need pics of the backside of the card.
I tried the bios vmod and nothing doin, this crap card i have is a dud.........at this moment i will try any kind of a mod, my next mod is a real solder vmod.
The programmable clock generators used on these boards are capable of thousands of frequency setpoints. The steps that the overclocking tool allows are only those steps allowed to it by the board's BIOS. Modifying the BIOS to permit finer control of the clock generator is not something I know how to do, but the limitation is definitely not the hardware.Quote:
Originally Posted by Lastviking
Core clock stepping seems to be proportional to the shader clock, meaning if you set your shader clock around 1800 you should get smaller jumps in core clocks. It works tha way on my card (eVGA SC 8800GT), I get some pretty big jumps when the shader is at default value but upping it to beyond 1800mhz makes the core clocks move in smaller increaments.
Are you 15min AtiTool artifact free at 800MHz? Have you tried DMM measurement to be sure it changes anything? I set my to 1.2v and same clocks as 1.1v. I squeezed extra 25MHz going from 1.05 to 1.1 though...Quote:
Originally Posted by HighT3ch
Regards
As soon as I get my grubby hands on some, they will be posted!Quote:
Originally Posted by largon
VGPU:1.3v wtercooled:
3DMark Score 17231 3DMarks
SM 2.0 Score 7218 Marks
SM 3.0 Score 6777 Marks
CPU Score 6352 Marks
http://img135.imageshack.us/img135/3...8800gt1hw1.jpg
Mate does it scale any more with more GPU voltage?,. Also is the memory voltage stock?Quote:
Originally Posted by pinto
What brand card also :p:
Nice results and thanks for sharing. :up:
OVP protection, i think, above 1.3v (or my card doesn't like more volt)
stock volt on memory but not max out (at least 1070mhz possible but not tested with 860mhz gpu)
My card is a BFG OC
temp wasn't really good 49°c full load (the Q6600 at 1.64v gets really hot)
:clap:Quote:
Originally Posted by pinto
Nice...
Yep, you are correct about OVP, 1.3v is the max you can get without it kicking in. Anything above 1.3v and my card will stop responding after a few minutes and mm reading is 0.01v until computer is powered down and restarted.Quote:
Originally Posted by pinto
hmmm 1.3 that's bad news
Maximum Volt Mod
just gotta see now whether that OVP point that was pointed out earlier in the modding thread will work....just need to get someone to test this out now
Is it possible to do the OVP mod by penciling the resistor? If so I'd be willing to play guinea pig.
Does the OVP play any role in BIOS max voltage?Quote:
Originally Posted by Mysterfix
i don't think bios can select that much voltage
'
from what people are reporting max 1.2v
so you have to hard mod but if only 1.3v it is not worth it unless you are going to push it on DICE
that is really nice for such a cheap cardQuote:
Originally Posted by pinto
Just ordered my Palit 3 phase 8800GT! Will be here in 3 days.
http://www.xpcgear.com/be880gtt3.html
Hurry up, they still have stock!
i was going to get one from them, but they have some really bad reviews at resellerratings.comQuote:
Originally Posted by Renegade5399
..also i read that one guy ordered this card from them and got the regular edition with refference cooler and probably without the 3phase power
It doesn't say phase 3 anywhere on it and the picture even says "Actual item may differ from image shown"Quote:
Originally Posted by Renegade5399
The part number doesn't come up on google, and the reference name is like this one:
http://www.hardwareschotte.de/hardwa...GT+NE8800TT352
Their main webpage doesn't list a product or part number either :/
Be wary...
Not a good sign.Quote:
Originally Posted by winbond
okay doing the mod. now. Freaked out this is my 1st one. What do I do 1st/
I have 1kohm vr ready to go and wire from a fan. multi meter =/ good rosin core 2.5 oz .032 diameter solder. HELP
using this as a guide http://www.xtremesystems.org/forums/...1&d=1194114049
Ok Mod BIOS and overclock testing again:
This is Max shaders i tried the next step but it is 2000MHz a big jump, not max core yet, vRAM didnt play much but at least it didnt get worst that before the mod.
http://i191.photobucket.com/albums/z...-1944-1035.jpg
Okay soldiering is done. Now what? do i measure something? plug it in? turn pot? HELP MAN!Quote:
Originally Posted by metro.cl
okay if I measure on the points I just soldered. (see image) I get 014.1 ohms does this help?
You're going to need a 500Ohm or 1kOhm VR for the vGPU. Where are you using the 20k?Quote:
Originally Posted by trans am
I'm confused? :confused: Did you mod the BIOS to get extra volts? Or did you use a VR?Quote:
Originally Posted by metro.cl
I have no idea. I measured the OVP resistor and got 3.22k So I penciled it down to 2.77k and it seems to have done the trick!Quote:
Originally Posted by Hazaro
I'm now able to set vGPU to 1.35v which is 1.4v under load! I played a 1/2hr. of CoD4 without any issues. I used to get a black screen after less than a minute.:D
It would be nice if one of the experts could tell me what the proper resistance should be for the OVP mod on GT cards.:rolleyes:
How hot is it getting?!Quote:
Originally Posted by Mysterfix
If you soldered you need to lower the resistance to get more volts, turn a little and check vGPU with a tester, and then try OC.Quote:
Originally Posted by trans am
only bios so farQuote:
Originally Posted by jason4207
Not hot at all really, went up 2ºc on the core (40ºc-42ºc)Quote:
Originally Posted by Hazaro
Mosfets and vregs are in hte mid to upper 40's sinked without a fan and mid to upper 30's with a fan.
How did you change vRAM?Quote:
Originally Posted by metro.cl
i didnt there is a pencil mod for that and it is quite easy, but this vRAM doesnt seem to respond good to voltsQuote:
Originally Posted by jason4207
Well I am hoping my RAM will fare better w/ a little extra volts. I was only getting 929 stable earlier. Now it seems 951 is stable...gonna try a little higher. I know 972 isn't stable. I don't understand why doing the BIOS mod would affect the maximum RAM clocks, but I'm not complaining. Maybe they just needed to break in?Quote:
Originally Posted by metro.cl
Yes, I did the BIOS volt mod. I just want to thank you guys for the valuable info, and thanks to Mavke for his hard work!
I was only getting 712/1674/929 (pretty low) stable earlier on my vanilla GT. I actually got a card w/ stock 600/1500/900 clocks despite the fact a lot of folks got SC factory clocks on their vanilla GT's. (got it through eVGA's step-up...320GTS-->GT)
Now I'm getting 741/1728/951 artifact free under ATI Tool...so far. Temps are 70 on the stock cooler w/ 100% fan.
Next step is to get the HR03GT (when it's released), and a good fan on there. Then some VRs will help me get in the 800/2000's...I hope!
edit: I may just leave my RAM alone if it'll run at 950. No use to go higher until I understand better this rumor I hear of the RAM dieing if you OC it to 1000.
Which one is the OVP resistor?Quote:
Originally Posted by Mysterfix
so is the bios mod working for you guys????? if so can you share a screen shot of the bios settings....thanks.
Go to bios section you will find it :) Yes, you can increase voltage by 0.05V from bios and it really works.Quote:
Originally Posted by GAR
Can you pinpoint which resistor it is and I can check mine. I am at 810/1944/2000 with air cooling @ 1.285 volts under load (Thermalright V2). Only 63C under heaviest load. I would like to try the pencil mod for the OVP to see if I can catch you water cooling boys. LOLQuote:
Originally Posted by Mysterfix
here's the image of my completed vmod.
nice how is OCingQuote:
Originally Posted by trans am
Quote:
Originally Posted by metro.cl
so turn clockwise or counterclockwise? also should I change multimeter from ohms setting to voltage now? is the best place to measure the vgpu on the solder points I made? because thats would be the easiest place to put the little crab hooks. otherwise i'm going to solder to little wires to the vgpu measure points and clamp on these. thanks in advance
Thank you sir!Quote:
Originally Posted by Mysterfix
Basically it doesn't matter as turning the VR the wrong way does absolutely nothing. You need to tune down the resistance (from ~14.5Ω) between the solder points in order to increase vGPU. Easiest way would be to measure the resistance and make sure it's around 15Ω, then power on the system and tune the VR until satisfactory vGPU is reached.Quote:
Originally Posted by trans am
Yup.Quote:
also should I change multimeter from ohms setting to voltage now?
That's if you're going to measure vGPU. :)No, the solder points have nothing to do with vGPU voltage - except ofcourse via the mechanism the mod works.Quote:
is the best place to measure the vgpu on the solder points I made?
vGPU measuring points are the violet points in this pic.
btw, this your 1st vmod?
:D
Quote:
Originally Posted by largon
THanks for all the info. I appreciate it. Yes, my 1st mod. how did I do? I guesss we wont know until I turn it on.
ps. my best clocks before the mod with a mcw60 is here:
http://i239.photobucket.com/albums/f...alsmith/37.jpg
http://www.xtremesystems.org/forums/...1&d=1194763028
Did the ovp mod on my 8800gt.
It still kicks in at 1,3V.
I use a 100k vr and set the resistance to 5k ohms after soldering.
Without the mod the resistance was 5,23k.
Should i try to decrease the resistance?
Bring it down to around 2.7k.
Got my 1k and 50k pots today. I am lucky enough to have a local electronics supply.
Imho you need to increase the resistance of OVP resistor to make it allow for higher voltages. Correct me if im wrong. At least it was that way on my giga 7900gs.
hey guys,wat core speed u guys get after vmod?need some rough idea about it while waiting for my 88gt:D
sory..i don keep track on this thread always:p:
trez0r,
Well, what can I say, this isn't a 7900GS...
:)
on topic of ovp.
i thuoght that you decrease resistance to said ovp resister and that inturn raises resistance of core volts?
which you just compensate by turning down resistance on v-mod til you reach desired volts?
have tryed it works but not nessaciry for me on air.
personally i don't like pencil mods, it's convenient but not reliable,
would it be possible to just disable the OVP circuit entirely instead of modding it to kick in at higher voltage?
Same opinion here, I guess soldering the proper VR will make OVP higher and so you'll be able to put more vgpu before the card goes OVPQuote:
Originally Posted by winbond
anyway, I'd prefer not to bother with solder just for OVP mod, this is boring, if the pencil mod works well on it at a particular resistance value, a simple piece of adhesive tape to secure it will be ok
At what specific voltage does the OVP kick in? I measured my volts at 1.305 running ATItool so it must be a bit higher than 1.3. I am using a Fluke dmm so it should be pretty accurate.
Can anyone else confirm the pencil mod works? My mosfet sinks should be here tomorrow and I will be ready to try it then.
After reading the hardforum link im a bit confused after this post http://www.hardforum.com/showpost.ph...95&postcount=1 Does that mean when i in Ntune or Rivatuner crank the RAM up to 1000MHz from standard 900, it actually runs at the dangerous 2000MHz?Quote:
Originally Posted by Renegade5399
Yes.
"2000MHz" is actually just 1000MHz but since we're talking about dual data rate memory it's effectively 2000MHz (= DDR-2000) - which according to a "certain BFG technician" is bad for Qimonda GDDR3.
Oh my I need to find my magnifier. I forget how small of an area I'm dealing with.
It's actually more like 1.35v under load as the gpu draws more power when in use. So setting 1.3v at idle results in about .05v -.06v increase under load.Quote:
Originally Posted by JKDC
On another note: The OVP mod doesn't work, I had my card black screen on me last night after about an hour of Crysis.:shakes:
Did you pencil it down as far as it would go? Why would it go for a solid hour? It seems like it would go black immediately. Maybe if you lower the voltage a bit (.01) it would make it.Quote:
Originally Posted by Mysterfix
Oh well...1.35 should be enough on air I guess. Hopefully I can go to 1.34 without problems. I think I'll try it now. :D
Anybody want to put it in step by step terms for the Vmodd. I had done the 7900GT Vmodd in the past with a silver ink conductive pen and it worked great. Can you all put it in laments terms on what to buy and how to do it? I have both the gel superglue and the silver ink pen, so I can probably do that without taking a big chance on saudering.
I was going to wait for the 8800GTS G92, but if I can get a vmod on a 8800GT I will take that route.
Cooling: MCW60, Swiftech Ramsinks, Swiftech VReg sinks
I don't know why it's not holding but I don't want to go any lower without finding out what is safe.Quote:
Originally Posted by JKDC
I set the OVP resistance stepwise down to 2,7k.
At 3,6k the GPU core droped down from 1,3V to 1,05V idle without changing the GPU core resistance .
After setting 1,3V GPU core like before, it still shuts off.
I turned the OVP resistance down to 2,7k and the core voltage droped down to 0,95V.
Set it again to 1,3V and got still a shut off.
I think we are wrong with this resistor for the OVP mod.
We need that ..... datasheet.
i could play through the crysis demo without problems @ 864/2106/950 but once i started playing stalker i would get black screens (driver crash?)Quote:
Originally Posted by Mysterfix
i went down from 1.35v to 1.27v and lowered the clocks but no matter what i was still getting the black screens, (i haven't done OVP mod)
is it possible that the cards just can't handle the voltage? or do we need a better OVP mod?
Set it to max. 1,22V idle. That will give you ~1,27V load.
Then you have a little reserve to shut off voltage.
While a aquamark run the Voltage jumps aprox 0,05V around.
i set my voltages while running 3dmark06 1680x1050, so the 1.35 and 1.27 was @ load
I measured the vgpu during black screens and got a reading of 0.01v vgpu which should indicate that the card shut down due to OVP. I also don't get that problem when the card is running 1.3v or below.Quote:
Originally Posted by winbond
Is there anyone here who've done the vmod and still are on air?
I'm using a VF900-Cu and my load temps are aprox ~60c.
Hmmm ok think im gonna lower my RAM just in case then and OC the core some more. I only got heatsinks on the RAM but watercooling on the core so it should be able to get to some nice speeds.Quote:
Originally Posted by largon
So even with the OVP mod, voltages over 1.3V seem to be giving problems?
I am going to do the vCore mod tonight and see what speeds can I get without going over 1.3V.
Yes I am. I ran it at 1.285 @ 810/1944/2000 stable in Crysis for hours. But my load temp was 50C before bios/voltage mod on a Thermalright V2. You may have to stop at 1.25 or so. Those are load voltages. I upped it to 1.335 and got 830/2000/2000 stable in ATItool and temp was 60C. I really don't want to hit the OVP though so I didn't go any higher.Quote:
Originally Posted by Viktor
OK, so for the soldering end of things, what do most of you use? The 7900GT volt mod required a conductive ink pen, that was easy. I have a micro tip iron and the low temp solder. What do you guys use for a magnifier?
If you all are putting in a 1k resistor, then how are you all doing to further adjusts the voltages? What voltage the the VGPU is the 1k Resistor resulting in?
96redformula7,
VR = variable resistor, .
No point in using axial resistors...
Soldering a 1kΩ VR in tuned @ max won't change the vGPU almost at all.
Which resistor would I want to use for 1.25V? Is it something that I could go and pick up right now from radio shack?Quote:
Originally Posted by largon
Thanks for the help!
It should be at Radio Shack. You can check online availability before you go there from the website. It costs $2.69, look up "potentiometer" VR search won't find it.Quote:
Originally Posted by 96redformula7
I preset mine at 530 ohms before having an electrical engineer do it for me. Yeah I cheated. :up: He had a pair of magnifying goggles so it was easy. I had him put it at the top of the card and run wires to the solder points so it is easy to adjust while in the case. Preset it with a dmm before having it soldered. 530 ohms gave me 1.16 volts. Just adjust from there...turn 1/8 turn and recheck and repeat and artifact check/check temps until you get where you want it. If you set it up like the pictures it should be counterclockwise for higher voltage/less resistance and clockwise for lower voltage/higher resistance.
Fantastic! Thank you.Quote:
Originally Posted by JKDC
Is the ~1.3V OVP for idle or under load?
Or does it vary around?
p.s. The Radioshack item you are looking for is a 1k-Ohm * 15 Turn Cermet Potentiometer
Item: 271-342 on front (I think this is it), and 271-0342 above serial on back
Alright, Thanks!Quote:
Originally Posted by Hazaro
some mixed responses here
does anyone have a way to bypass OVP so far
and people watercooling without full blocks
what are you putting heatsinks on
PHOTOS mandatory here or ban/ :D
OVP is at 1.30v idle and 1.35v load. Actually it kicks in at 1.35v so a 1.30v idle setting will trigger it when it is loaded. The card adds .05v between idle and load. All Radio Shacks near me had the Cermet 15 turn pot. but I did get the last one in my town. :D
Thanks for the clarification. Anyone else to verify if they want to look at some more pretty blue/black screens? :DQuote:
Originally Posted by JKDC
My circuitwriter is due to ship Monday, hope it gets here before thanksgiving, otherwise it will be a while.
Gonna probably pick up a DMM at sears too, and maybe buy some gel super glue :yepp:
I just bought a 25W soldering iron, but have a feeling I need to return it to get a lower powered 15W. I have soldered before, but with a clunky gun shaped one. So I have to get some practice in on some old PCB's. Is Silver-Bearing Solder with Rosin Core alright to use for the VMod?
Thanks again guys.
Definitely go w/ the 15W. I'd go w/ standard rosin-core solder. That silver stuff may have a high melting temperature. I could be wrong, though.
I will stop back by radio shack tomorrow and get it exchanged. Thanks
anybody confirm yet if Palit (supposedly 3-phase), has same volt-mod, and responds better to OVP?Quote:
Originally Posted by GoldenTiger
warm ripe memories of 7900GT..
everybody wanted to max the juice, but too cheap to upgrade cooling.
btw: miss those good old days when you could dial in exactly voltage you wanted. XFX 7900GT + dip switch ~ 2 solid months of tweaking fun.
Just got a BFG 8800GT from best buy right now $250 on sale. Expect it to be volt modded soon.
Do I have to get a Multimeter or can I just put on the 1k ohm 15 turn potentiometer straight on? The screw is how it came inside the package from radioshack.
96redformula7,
There's no way to know what vGPU you end up with without a DMM.
Besides, a DMM is very useful in general.