Nvidia 8800GTS Vmods

[lasse.j5]

My stock voltage messurements of my Inno3D 8800 GTS 640 MB

VGPU:

Idle: 1.26 V
Load: 1.21 V

Vmem:

Idle: 1.88 V
Load: 1.88 V

There should be a vdroop mod for the G80

[cowie]

did i miss something here?but my gts blanks after 1.428,ovp work around anyone?or is it cooling?honestly load no more than 59-60.
clocks up to 720-30.but any reply would be helpfull

[Barr3l Rid3r]

3D06 12k
http://service.futuremark.com/compare?3dm06=1768813

3D05 20500
http://service.futuremark.com/compare?3dm05=2951879




5% voltage increment = @ 690/2000Mhz @ 1.4V vs 1.26V stock (630/2000Mhz) both Vertex 1350Mhz @ GTX

[Riska]

My Inno3D 8800Gts 320mb
Stock core
1.274v idle
1.233v load
stock mem
1.885v idle
1.884 load

[SerialSniper]

Sorry if this question has already been asked, have not read entire thread.

Anyone know if this mod works also?

http://www.vr-zone.com/?i=4641

I already bought the 20K & 500 Vrs in this guide before seeing this thread...

[SF3D]

Yes. It will work just fine.

[PCduster]

Sorry if this question has already been asked, have not read entire thread.

Anyone know if this mod works also?

http://www.vr-zone.com/?i=4641

I already bought the 20K & 500 Vrs in this guide before seeing this thread...

I just did the vMem pencil mod in that article and went from 1.852v to 1.961v

Looks like it is giving me a little over 100MHZ on the mem. Before, I was 100% stable at 999, and could bench at 1053. Now it looks like I am stable at 1107. I have yet to see what I can bench at..

Gonna give the core vMod a shot here soon.. Do you guys think I may get some pretty decent results? My core is 24/7 stable at 684 under water, and I can bench at 702 as is. I was thinking that an extra .1V may get me into the low to mid 700's for benching.



Oh yea, I took some reading's before I started messing around.

Core: 1.264v idle 1.22-23v load
Mem: 1.852v idle 1.849v load

[SerialSniper]

For the core mod in the article i linked. how can I calculate the vcore it will give me with a given resistance? reason i ask is the 500ohms VR i got is reading only 425ohms when testing with a multimeter. (Yes its turned all the way). i need to know if I stick this 425ohms on it what vcore I'll be at?

cheers

[jVIDIA]

Anymore vMem pencil mod success cases ?

Memory temps after the mod are mutch higher ? (don't think if there is an easy way to know that but ... )

[PCduster]

Anymore vMem pencil mod success cases ?

Memory temps after the mod are mutch higher ? (don't think if there is an easy way to know that but ... )

FYI, in my case, I upped the voltage to 2V and only got another 17MHZ of usable clocks.

Temps were checked by the tried and true "finger on the ramsink" method. The mem never felt hot, just warm. No discernable difference from before and after the volt mod.

I am going to stick with 1.96v on the mem, and teh 1107MHZ.. treating me good.

I am about to order the trimming pot for the core voltage soon. Pretty excited to see how it does..

[halo112358]

Idle 1.35V is higher than load ? Weird card..

I had same behavior on a vmodded 7600GT, idle was ~0.05V higher than load.

[TraX]

Another successful vmod on 8800gts 320mb
stock vcore = 1.21v
stock vddr = 1.81v

Measures image below are all at load in 2001se. We did not encounter OVP at that voltage. But I'm sure we will on the next run, does anybody know a way around the OVP?

[jVIDIA]

XFX 8800GTS 320mb 500/800 "normal" version

Stock vGPU
1.236v idle
1.216v load

Stock vMEM
1.867v idle
1.868 load

Isn't the vGPU too low ?

[dinos22]

is there any chance to NOT do permanent mods but rather pencil mods on the card >>> i've got a swiftech MCW60 sitting on the desk for it

my MSI 320M 8800GTS seems like a nice card

stock cooler

(could push memory a little further)

675MHz Core
999MHz RAM

[TraX]

is there any chance to NOT do permanent mods but rather pencil mods on the card >>> i've got a swiftech MCW60 sitting on the desk for it

Dinos22, what we do here is use conductive paint as a 'solder'. So I mask out the area with insulation tape, in this case the one side of the resistor, tape a single core wire (if possible, not necessary) up to the resistor so that it just touches, think put a tiny blob of the conductive paint (must be the adhesive kind). And that takes the place of soldering. When you are done clean up with acetone. I can post an image if you like?

[dinos22]

Dinos22, what we do here is use conductive paint as a 'solder'. So I mask out the area with insulation tape, in this case the one side of the resistor, tape a single core wire (if possible, not necessary) up to the resistor so that it just touches, think put a tiny blob of the conductive paint (must be the adhesive kind). And that takes the place of soldering. When you are done clean up with acetone. I can post an image if you like?

IMAGE

yes please



WTF you clean PCB with ACETONE!!!!!!!!!!! errrrrrrr

[TraX]

OK, image is not the greatest, and card is @ home now so I can only upload better images later. But I think it is good enough to present the concept...

WTF you clean PCB with ACETONE!!!!!!!!!!! errrrrrrr

I use an earbud, dip into acetone & clean specific area, normally only a few pinheads big. Am I about to get a lesson in why not to use acetone on a PCB? :p

[dinos22]

sooo what do i smear with conductive pen exactly

hehehehe

acetone eats through PCB and exposes traces lol but i guess if small amount maybe it ain't an issue donno

[TraX]

sooo what do i smear with conductive pen exactly

hehehehe

lol, I know its ghetto, but there is some skill involved

You need to mask the area out carefully as I'm sure you would know. You have to make sure there will be no contact to the adjacent resistors, then put a blob to connect the resistor & the wire. But probably even more important is that you need the adhesive type conductive paint (thats what they call it here in SA, anyways ), reason being is it's much thicker & wont run. The windscreen repair kit type paint will bleed under the insulation & cause problems. Not sure about the pen, have never tried one before... So test it first.

Hope that helps

[dinos22]

pls confirm that you are basically connecting the two poles of that resistor that's insulated with conductive material right?

you could also use a 2B pencil for that i reckon hey

[TraX]

pls confirm that you are basically connecting the two poles of that resistor that's insulated with conductive material right?

you could also use a 2B pencil for that i reckon hey

No, I'm not explaining myself well...

On the diagram below assume that the right side of the indicated resistor is where you want to make contact. Mask out the entire surrounding area with insulation tape (or equal) to avoid contact with surrounding components, tape your wire up to that point, then apply the conductive paint. The image does not show the masking.

[dinos22]

oh i see now

instead of soldering you are simply "gluing" the wire to resistor so to speak

looks like a lot of work mate

[TraX]

oh i see now

instead of soldering you are simply "gluing" the wire to resistor so to speak

looks like a lot of work mate

Yes, not as quick as I would have hoped for. It took me around an hour to do vgpu, vddr & a read point for each. Not sure how long soldering takes, I don't have a soldering iron & have no soldering skills. So this method is great for me ...and as you asked, it is not permanent

[Moonman]

I need some input guys.

Between this red spot and ground I measure 469 ohms. I tried with 2 different multimeters, so it has to be accurate.
So if I wan't to vmod it I'll need a 5k or 10k trimmer ?
Card is Gainward 8800GTS 640MB

[cowie]

try a 500ohm 15-18 turn vr or a 1kvr set at 490-500ish to start.
just for heads up on my evga 88gts320sc 240ohms is about 1.40 at load
may be differant on different cards depending on stock core volts thuo.