8800GTS 512Mb (G92) vMods

[largon]

It's the same principle as for G80GTS:

This pic is of a GT so there's no SMD for 3rd phase...

[andrew2004gto]

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?

[cole2109]

Idle 1.33V
Load 1.38V

[T_M]

It's the same principle as for G80GTS:

This pic is of a GT so there's no SMD for 3rd phase...

Thanks vortan and largon.
Do the addition resitors help even without performing the OCP mod?

[gOtVoltage]

Oh really? Funny like what? Artifacting or something?

Just benched 06 at 900/2200/2300, 1.41V idle so around 1.46V load:



If only i had a quadcore.

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 ...

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..

[T_M]

Keep us updated mate cos ill jump out and grab some straight away

[jason4207]

Exotic cooling is all mine runs



Can you draw what you mean on a photo please.

When does the OCP kick in on this card? How much voltage do you pump in w/ exotic cooling?

Others have already provided the pics.

[T_M]

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

[jason4207]

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.

[T_M]

OCP definately kicks in for me on GT2 every time when above 1.505v set idle (~1.6V load)

[dinos22]

shame you don't have a 5.6 quad

[aussie-revhead]

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.

T_M do you think OCP would kick in at those volts regardless of cooling method ? If so then it does matter to us on water and air . Could you describe the symptom you get when OCP kicks in ?

[Zeus]

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 ...

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..

Thanks bro, i'll keep that in mind, even though i'm only running that high while benching.

OCP definately kicks in for me on GT2 every time when above 1.505v set idle (~1.6V load)

Lovely score and overclock.

How do you notice ocp kicking in?
Driver restart or screen freezing?

[T_M]

Black screen restart

[dinos22]

Black screen restart

can you tell us what different restarts there are and what symptoms normally occur also including what happens to GPU volts during different crashes

[aussie-revhead]

I wasnt game to ask a complicated question like that , so Im glad you did .

[cole2109]

[aussie-revhead]

GPU 1.3V (load) game stable for now...
Accelero + 120mm

Those are great clocks , is that still with the excellero ? What are your temps like ?

[cole2109]

No...
Accelero@850Mhz temp. 55c on Crysis
Water@900MHz 1.33V (Idle) temp. 43c on Cryisis, 940MHz 1.45V (Idle) temp. 44c AtiTool

[Zeus]

No...
Accelero@850Mhz temp. 55c on Crysis
Water@900MHz 1.33V (Idle) temp. 43c on Cryisis, 940MHz 1.45V (Idle) temp. 44c AtiTool

Excellent clocks there, 940 at 1.45V idle is nice, what were your shader clocks?

[yiancar]

hello , can i use any other value for the gt card exept 1.2k? tnx yiangos

[jason4207]

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! Nice clocks man! 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!

[yiancar]

electrician gurus help the noooobs

[ViperJohn]

hello , can i use any other value for the gt card exept 1.2k? tnx yiangos

4.2k SMR's will shelve the Isen signal down about 30% lower that stock. A 1.2K will shelve it down 50%. What counts is all SMR's added (2 for a GT and 3 for a G92 GTS) are the same value.

Viper

[yiancar]

4.2k SMR's will shelve the Isen signal down about 30% lower that stock. A 1.2K will shelve it down 50%. What counts is all SMR's added (2 for a GT and 3 for a G92 GTS) are the same value.

Viper

so i put a 1.1k or smthing like that it will go less?