8800GT voltage mods

[os008]

Can anyone tell me if it's OK that the resistor is gone?

I think it depends, the card might work fine, but there might be a voltage increase because of removing that resistor, or a decreased functionality that won't appear till you do something specific, or just a general instability!

You should consider replacing it though. Someone here could give you better advice.

[Demo]

someone PM'ed me on penciling the area, would it also work ?

My base overclock is limited to 720/1728/900

should i bother doing the vGPU mod ?

[Demo]

I took all the mods off the card and tripple checked that all the components were there... It looks exactly like stock, I even compared it to my other card. yet it still has the same problem... This card just died somehow ><

Maybe my motherboard fried it somehow with the other slot?

Did you try to put the stock cooler back on, some cards are very sensitive to mounting pressure and they artifact like crazy even if the card isnt warped.

[largon]

Demo,
That would be the correct place to pencil for higher vGPU.

[scottc19]

Did you try to put the stock cooler back on, some cards are very sensitive to mounting pressure and they artifact like crazy even if the card isnt warped.

I put it back on, and it still has the problem, it looked slightly differnt, but still doesnt work

[Demo]

Demo,
That would be the correct place to pencil for higher vGPU.

Thanks, with my base overclocks of 720/1728 , with such a low base of overclocking do you think it is still worth a volt mod ?

[Renegade5399]

Well now I am over 2200 shader.







Seems to have more of an impact once you max out the core clock. The shader will keep going for a bit. I will try for more later.

[scottc19]

DEMO where would the mounting pessure affect it? on the core?

[HitandRun]

Well now I am over 2200 shader.







Seems to have more of an impact once you max out the core clock. The shader will keep going for a bit. I will try for more later.

Nice scores on that card! One thing I noticed is that you don’t gain too much going over 800Mhz anyway! I scored almost 16K (3dMark06) running the card at 780/1800/2200 and the CPU at 3.8G. Any more GPU OC would not give me better scores!

[scottc19]

Nice scores on that card! One thing I noticed is that you don’t gain too much going over 800Mhz anyway! I scored almost 16K (3dMark06) running the card at 780/1800/2200 and the CPU at 3.8G. Any more GPU OC would not give me better scores!

probably becuase the thing holding you back was the mem clock of the card

[clockero]

Nice scores on that card! One thing I noticed is that you don’t gain too much going over 800Mhz anyway! I scored almost 16K (3dMark06) running the card at 780/1800/2200 and the CPU at 3.8G. Any more GPU OC would not give me better scores!

LOD = ?

[Demo]

DEMO where would the mounting pessure affect it? on the core?

Yes on the core, mine is extremely sensitive to pressures to the point that its very unbelievable.

[natedog420]

Well now I am over 2200 shader.







Seems to have more of an impact once you max out the core clock. The shader will keep going for a bit. I will try for more later.

nice clocks but dont run fur benchmark. some people ran it at higher voltages when modded and it fried there card. just warning you before hand if you run high voltage. you can still run it i just recommend not running it i hate seeing hardware burn up. just my 2 cents

[Nosfer@tu]

So I take it 1.2 Kohm resistors for the 8800 OCP mod is to low ?

I belive on guy here lost is card because he went to low ?
It is a while ago I read the thread and had given up on my card.

[jason4207]

1.2k isn't too low, but there is no reason to go that low unless you are trying for some serious clocks w/ major voltage under DI/LN2. ~4k is better suited to air/water.

The guy that lost his card had removed an SMR. Thus removing the circuit that detects OCP, and also making it difficult for the card to balance the load b/n the MOSFETS. One MOSFET received too much current, and blew up!

[Renegade5399]

nice clocks but dont run fur benchmark. some people ran it at higher voltages when modded and it fried there card. just warning you before hand if you run high voltage. you can still run it i just recommend not running it i hate seeing hardware burn up. just my 2 cents

And here's why. I am set for ~1.45v load. Every bench runs around that. Lightsmark will hit about 1.475v. But FUR on the other hand spikes the card over 1.52v. This is probably why people's cards are dieing. Mine is water cooled and never breaks 38°C loaded. I have sinks on everything the stock cooler touched, plus a couple other components I found to be hot.

So I take it 1.2 Kohm resistors for the 8800 OCP mod is to low ?

I belive on guy here lost is card because he went to low ?
It is a while ago I read the thread and had given up on my card.

I used 2.2k ohm 1/4 watt resistors from Radioshack. Soldered wire leads on them and soldered the leads to the surface mount caps on the board.

[Heinzkopf]

I also applied a voltmod to my 512mb 8800gt (sparkle).
Works fine, I set the card to 1,25V IDLE which results in ~1,23V LOAD.
With these voltages i can reach around 770mhz gpu clock

But my problem is, the card gets really hot. I don't mean the GPU, it doesn't exceed 50&#176;C LOAD (I use the accellero S1).
No i mean the other "parts" of the card.
especially these ones:

I can't even touch them...The area around these (commutators?) is very warm too.
Is this normal? Because i don't wanna fry my card in the next days..

I only set it to 1,25V IDLE because I thought it should be still safe isn't it?

And another thing i recognized- after doing the mod some parts of my card do strange sounds- like a summing/humming

[natedog420]

you will get some humming if you will if you run more voltage. get some heatsinks over them with a fan. i put heatsinks on everything on my card. remember most things perform better when there operating in cooler temps than hotter temps.

[Demo]

I also applied a voltmod to my 512mb 8800gt (sparkle).
Works fine, I set the card to 1,25V IDLE which results in ~1,23V LOAD.
With these voltages i can reach around 770mhz gpu clock

But my problem is, the card gets really hot. I don't mean the GPU, it doesn't exceed 50°C LOAD (I use the accellero S1).
No i mean the other "parts" of the card.
especially these ones:

I can't even touch them...The area around these (commutators?) is very warm too.
Is this normal? Because i don't wanna fry my card in the next days..

I only set it to 1,25V IDLE because I thought it should be still safe isn't it?

And another thing i recognized- after doing the mod some parts of my card do strange sounds- like a summing/humming

Before the volt mod, how what were your max core/shader clocks ?

[Heinzkopf]

Before the volt mod, how what were your max core/shader clocks ?

With Standard 1.05V BIOS I only could reach 640GPU. With 1.10V 680GPU/1700Shader was max.

But I lowered the voltage now. I don't want to risk killing my card. Now it is around 1.15V which results in 720GPU. Thats enough for me and i think I can let the card work without extra cooling from the back.

[largon]

Heinzkopf,
That's perfectly normal, those components are mosfets that convert vGPU and vMEM voltages so it's normal they get hot especially when voltmodded and overclocked. All you can do is sink 'n' fan 'em.

The buzzing sound gets the stronger the higher your card OCs. Most likely it's caused by the encased vGPU inductors (big block-like components) on the frontside of the card. It's not dangerous at all.

[Demo]

With Standard 1.05V BIOS I only could reach 640GPU. With 1.10V 680GPU/1700Shader was max.

But I lowered the voltage now. I don't want to risk killing my card. Now it is around 1.15V which results in 720GPU. Thats enough for me and i think I can let the card work without extra cooling from the back.

Mine is at 1.15v default. im also getting 720/1728

[gOJDO]

Demo,
That would be the correct place to pencil for higher vGPU.

What place? the marked 2 red points on this pic?


Is this going to work on my Asus EN8800GTS 512MB g92?
And are there any other pencil mods(except the video RAM mod, which made no difference in my case) that could be applied on it?

[Demo]

My card is a 1Gb model, i think we have a different PCB.

[gOJDO]

is it a GTS or a GT?