8800GTS 512Mb (G92) vMods

[VoRtAn_MaDgE]

Middle off.
left or right depends on which pot he wants to use!

These vga's above 52/53 aircooled seems to have an issue

I measured temps using rivatuner on non-sucessfull 3dmark06 runs... all of them (the non-sucessfull's) are due to driver restart...then i check the temp on rivatuner...and there it is...53ºC

Zeus...stock bios from each manufacters are the same...only differences on the clock's (overclocked versions) and the name of the vga manufacter... already look deep into 4 (gigabyte, xfx, gainward and bfg) all same!
Mem timmings are just exactly the same!

Can anyone express in terms of mhz the gains reducing vmem?
I'm not seeing any in my case!

[Zeus]

Middle off.
left or right depends on which pot he wants to use!

These vga's above 52/53 aircooled seems to have an issue

I measured temps using rivatuner on non-sucessfull 3dmark06 runs... all of them (the non-sucessfull's) are due to driver restart...then i check the temp on rivatuner...and there it is...53ºC

Zeus...stock bios from each manufacters are the same...only differences on the clock's (overclocked versions) and the name of the vga manufacter... already look deep into 4 (gigabyte, xfx, gainward and bfg) all same!
Mem timmings are just exactly the same!

Can anyone express in terms of mhz the gains reducing vmem?
I'm not seeing any in my case!

Not sure on that mate, i've seen al lot of different versions, so far i've seen:

62.92.16.00.09
62.92.16.00.25
62.92.16.00.26
62.92.16.00.39
62.92.16.00.43

I'm just wondering if there's any difference.


What do you mean by driver restart?

My card gets unstable at over 50ºC, yellow dots appear in ATItool.

I'm awaiting my EK fullcoverwaterblock so i can finally max the card out, with the stockcooler it seems impossible because it reaches 50ºC rather quick.

[VoRtAn_MaDgE]

Not sure on that mate, i've seen al lot of different versions, so far i've seen:

62.92.16.00.09
62.92.16.00.25
62.92.16.00.26
62.92.16.00.39
62.92.16.00.43

I'm just wondering if there's any difference.


What do you mean by driver restart?

My card gets unstable at over 50ºC, yellow dots appear in ATItool.


I'm awaiting my EK fullcoverwaterblock so i can finally max the card out, with the stockcooler it seems impossible because it reaches 50ºC rather quick.

As i said before, from the bios models that i already tried the differences are the clocks and the manufacter.
Driver restart is when the vga driver sef-restart caused by a fault (overclock for example)
You'll get that information on your traybar when it happens!

[Zeus]

OK thanks, i was just wondering.

Makes it easier for me so i don't have to flash the cards bios.

I've never had a driver restart happen to me, if overclocked too far it just locks in 3d mark.

How easy is the Vmem reduction mod, is it soldering a pot or is it just a pencil mod?

[VoRtAn_MaDgE]

How easy is the Vmem reduction mod, is it soldering a pot or is it just a pencil mod?

Hard mod...no pencil.

[aussie-revhead]

To avoid some possible missunderstanding:

OVP = Over voltage protection (typically if you reach this point the system will freeze/reboot even with no load)
OCP = Over current protection (typically if you reach this point the system will freeze/reboot only under load)

On G92 8800GTS, what we see is likely (i havent tested) to be OCP, which kicks in around 1.6V and high clocks under load.
This is not the idle voltage however, due to overvoltage under load, so you actually can only max out your voltage to about 1.5-1.525V idle.

Hi guys , T_M - in regards to the information you showed me above , I have volt modded and water cooled my G92 GTS and it has responded very nicely , but as soon as I push vgpu above 1.45v I get gpu lockup in 3D06 , I can escape out of it most of the time and it will recover but it doesnt respond to more voltage , if anything it gets more unstable , is this OCP kicking in ?

I can bench up to 900 core 2250 shader and 1150 mem at 1.4vgpu , is this good ? I managed to score 17887 in 3D06 with my main goal to break into the 18k range but this issue seems to have halted my progress , unless I go back and try to get some more out of my cpu but its not a special one and will only bench to 9x435=3915mhz .

Any input would be great.

[dinos22]

that's awesome man

you are doing well with the OCs for sure

nice modding too.....very neat

only thing i could suggest is try backing off on RAM OC and see if your core/shader go higher
also try backing off on core a bit and see if you can get some bigger jumps in shader

bench 3DMARK05 for stability first as it's really tough on these cards

[Zeus]

Hi guys , T_M - in regards to the information you showed me above , I have volt modded and water cooled my G92 GTS and it has responded very nicely , but as soon as I push vgpu above 1.45v I get gpu lockup in 3D06 , I can escape out of it most of the time and it will recover but it doesnt respond to more voltage , if anything it gets more unstable , is this OCP kicking in ?

I can bench up to 900 core 2250 shader and 1150 mem at 1.4vgpu , is this good ? I managed to score 17887 in 3D06 with my main goal to break into the 18k range but this issue seems to have halted my progress , unless I go back and try to get some more out of my cpu but its not a special one and will only bench to 9x435=3915mhz .

Any input would be great.

Do you mean 1.4Vgpu 2d or 3d? Cause 1.4V 2d is 1.45~1.47V 3d.

What clocks did you get prior to the Vmod and what temps do you get now with watercooling?

I think 900/2250 is very nice, most top out around 900-915 core with voltmod and around 2200 shaders.

Also 1150 on the mem is very very good.

I hope to reach the same when i can finally strap my EK blok onto the card.

[dinos22]

that is definitely highest RAM OC i have ever seen no matter the cooling considering how hard he's pushing the core/shader

[aussie-revhead]

Thanks guys , but seeing these guys benching with 45nm at 4.5-5 GHz is making my wallet hurt with anticipation

With stock volts the gpu temps top out at 43 degrees under load in a fairly warm case (currently 40 degrees). With 1.3v it tops out at 49 degrees , 1.4 pushes load temps to 50 and 1.5 topped out at 52 degrees , but then I get the above mentioned graphical lockup .

I will add a pic when I get them out of the other pc .(its busy benching)

Dino - the mem benched happily at 1100 before I modded anything too , with stock cooler , I dont think I pushed it any higher .

Do you mean 1.4Vgpu 2d or 3d? Cause 1.4V 2d is 1.45~1.47V 3d.

Measuring with DMM set in bios or idle , it does rise a little under load but not that much iirc.



below is a pic - its a poor angle but you can just see my toggle switch for dual vgpu settings and 2x VR's . Then there are just some pics showing how good the EK block looks .

[pumbertot]

bloody awesome mate, good to see an 'amateur' o/c compete with the top clockers.

[Zeus]

that is definitely highest RAM OC i have ever seen no matter the cooling considering how hard he's pushing the core/shader

Yeah, that ram clock is pretty awesome, mine does 1130 unmodded with the stock cooler, i hope to reach 1150 with my EK block.

[T_M]

My guess is you are topping out due to heat.
Independently clock your core, then your shader, to find out which one is limited at those volts if any.

[aussie-revhead]

T_M , I have seen what you and others have said about temps but how is this possible when the stock cooler generates much more heat without failure ? The difference in my loaded temps between 1.3-1.4-1.5v is very small . Also , clocks that will pass at 1.4v fail at 1.5v without making more heat , in fast even 800 fails when vgpu is set to 1.5 . Based on these I assumed it sounds very much like OCP kicking in . Another point is - at 1.3 or 1.4v I have not found a gpu clock that locks up , only scores start to drop again , where at 1.5 it goes berzerk regardless of clocks .



Hey Paul - thanks for the encouragement .

[T_M]

Well, have you tested what the loaded vGPU is when it crashes?

[Zeus]

Don't think it's the ocp kicking in, when that happens the card shuts down and the system freezes or crashes/reboots i think.

I have a feeling the vreg circuit can't take it due to noise or something.

In the 8800GT voltmod thread ther was a picture of a card with added caps, maybe that will help yours to clock higher at higher voltage?

I just recieved an email that my EK block will be send on wednesday (finally!!), as soon as i have it mounted i will do some testing with mine, Vmod is already done.

[STEvil]

Oh how I love macro....

Easy breezy to see where you can and can not solder

edit

darn this is hard to do with a gas powered iron and huge tip lol

well, kinda hard to make it stick to that point really is all.

[dinos22]

lovely macro man
same camera or did you get a different one

[STEvil]

Still the Canon SX100IS

edit

added after-mod pic

[T_M]

Did you intend to solder to almost every component/pad in a 1 meter radius of the mod point? :P

[STEvil]

Yeah pretty much

[Timbosan]

Oh how I love macro....

Easy breezy to see where you can and can not solder

edit

darn this is hard to do with a gas powered iron and huge tip lol

well, kinda hard to make it stick to that point really is all.

wow dude...... maybe its time to invest in a normal iron lol.

[dinos22]

wow dude...... maybe its time to invest in a normal iron lol.

or pair of steadier hands
heheh
hides under rock

[STEvil]

I actually had it on the normal spot fine (that little dot) but I didnt like it.. didnt want it to rip off too easily.

Which is funny because I packaged the card back up after doing the mods and took it to the PC it was going to be installed in (different house several miles away) and since i've installed the card I have found that the mod for measuring the memory voltage came off (due to putting it back in the original packaging)... didnt look really close to see if it took the cap with it though.. dont want to look lol (edit - I looked, cap is still there so i'll blame a poor soldering job as part of it).

Easy fix really, but no iron here..

Also, since this is still about volt modding, my card (XFX 8800GTS 512mb Alpha Dog Edition) is running 1.18v idle and UP TO 1.225v under load... average about 1.20v under load (at stock)

vmem is exactly 2.00v.

Also, this might sound like a dumb question... but what the heck do I use to overclock this thing.....?? Rivatuner wont give me any tabs to work with like it normally does... lol....

[T_M]

You need to edit the .cfg file in the Rivatuner folder.

http://www.xtremesystems.org/forums/...5&postcount=64