all vmod for all 6800

[Jethro]

Heres the bios INF to prove 1.6 is possible:

[Jethro]

If anyone would like the modded bios to test i can upload it. Its modded via script to 16/6 and 1.6v gpu with stock clocks. 350/700 perf mode forced on.

[stealthbomber]

The VID value of 00000011b represents 1.5v for pretty much all 6800LE/NU/GT/U bioses unless the Asus card's interpret them differently (in which case that still doesn't apply to your card), now if you had VID 00000111b or something similar then I'll take that as proof.

Just added another 4700uF cap for the GPU (look at the pic closely on page 2 you'll see there was actually none on the GPU line ), just ran one loop of both 3DMark2003/2005, glitch free so far, easily broke 12k's/5.2k's @438/936MHz...

Thanks again for the assist where credit is due.

[Jethro]

the bit you refer to is actually my "performance mode" voltage and uses whatever voltage you set it to in modding ones bios. look again at my bios INF.

I could be wrong mind you. Either way it is at 1.6v. Do i need to take a picture of my multimeter?

Nice cap modding btw. Im gonna try the vmod + the cap ive installed before i add more. Have to get some more variable's.

[OnLine]

[stealthbomber]

I'm using that Asus 6800GT 128MB DDR1 bios as well remember, I'm >99.9% certain you are still running @1.5v...

Anyone here tried the 2x 12v molex mod where you simply hook up another 12v line from a separate molex cable to the card's 12v molex power cable?

Edit: to make it clear, nothing to do with the above 6800GT molex mod.

[Jethro]

so are you saying that its not possible that im running 1.6v or that just because you have never seen it its not possible? via bios that is? And how do you know that the EVGA card does not support this plausable ASUS bios option? This EVGA card only differs from the asus in that it has 2.2ns ram instead of 2.8.

Im curious. Maybe ill learn something

[stealthbomber]

LOL

AFAIK, the only way to go above 1.5v is to perform an actual volt mod, many have confirmed this, I HAVE tried modding that Asus 6800GT bios (both 128MB and 256MB version), voltage is the same, 1.5v max regardless of what the register says because the VID value is what dicates the voltage, not the label.

I need more GPU voltage, I'd love you to prove me wrong with an actual DM reading...

[Jethro]

Its ON! now i have to figure out how to see TP11 past all the heatsinks i just installed lol. So you to have seen 1.6 in your BIOS INF? and in rivatuner? Can you tell im being really lazy and quite content with my card to even get up and measure the volts LOL.

[stealthbomber]

In nibitor yes, not in rivatuner, you probably have choosen the incorrect VID option.

[Jethro]

well i guess ill have to pull card to see where tp11 is and measure. If its at 1.5 then great cuz ill feel better about leaving it there that if it was 1.6.

[stealthbomber]

Don't kid yourself, if it's measured 1.5v then you know fine well you're gonna need a volt mod...

[Jethro]

well duh , i am at 31~35c even with 1.5v depending if my direct cooling is on or not its all about the voltage circuit now hehe. im gonna be lazy and check it tomorrow and just burn the card in some more at 1.? tonight lol.

me ram is ok with 950 in most apps but it will need some more to be 100%. Cooling is not a prob anyhow Ill post how it does with more than its current 2.72v + cap. testing 866 for 100% stability now after cap mod.

[kryptobs2000]

If I were to take a fan and solder it just before the molex connector, it wouldn't cause any problems would it? This way it'd be alot easier since the fan wouldn't have to be plugged in otherwise, just the power molex and thats it.

[firada]

What I Can Make In Order To Runs My Card ?Ι Have A Geforce 6800le (msi) And I Can Resolve Still The Problem Of Black Screen!i Tried With A Cap 3300mf / 16v For The Memory(tp1) But Did Not Become Nothing!now I Try A 2200mf / 1ov With That I Can Put Core 300 And The Memory In The 800, But Without Run The Games!please Helpppp!!!!

[kryptobs2000]

Are you saying it won't run stock? Use a flashed bios to up the vcore, try maybe 1.4v (stock is 1.2v right?)

I'm gonna go to radioshack and get what I need, and I'll write up a guide on the additional molex, and I SHOULD have it posted by tommarrow for anyone who's interested.

[matt9669]

If I were to take a fan and solder it just before the molex connector, it wouldn't cause any problems would it? This way it'd be alot easier since the fan wouldn't have to be plugged in otherwise, just the power molex and thats it.

The only thing it will do is increase the power draw on the molex, so as long as you're not using some crazy 10amp fan you're gtg.

Or, if you added it in series - shame on you, your momma taught you better!

[kryptobs2000]

well I went to radioshack and I got everything except for the MJE2955 transistor. So thats all I need

What am I looking for to find a replacement? Does it have to be TO-220 (don't even know what that means). Or what? Could someone please explain this to me... in uh... laymen terms so it'll be easy for me to understand

edit: figured out what the to-220 is, it's just the uh.. shape or w/e you'd call it. I dunno these terms.

edit2: will this work? http://www.radioshack.com/product.as...%5Fid=276-2027

[OnLine]

well I went to radioshack and I got everything except for the MJE2955 transistor. So thats all I need

What am I looking for to find a replacement? Does it have to be TO-220 (don't even know what that means). Or what? Could someone please explain this to me... in uh... laymen terms so it'll be easy for me to understand

edit: figured out what the to-220 is, it's just the uh.. shape or w/e you'd call it. I dunno these terms.

Yes that's right, like You said it's the shape or form.

edit2: will this work? http://www.radioshack.com/product.as...%5Fid=276-2027

Good replacement, very good I believe.

Before connecting Vout to the board, make 100% sure your home made psu [ which this mod is ] works properly. Make sure You can adjust Vout from ~1.25V up to ~1.77V. The circuit should allow that. Use different loads like resistors/lamps etc to see if Vout is stable.

*You can get even higher Vout but then You must use a 1K pot.
You don't need higher output voltage for this application, that's why I replaced the 1K ohm pot with a 100 ohm pot.

[kryptobs2000]

Great, I'll go back to radioshack and pic one of those up. I'm learning slowly how everything works . And I got a 1k pot since thats the lowest radioshack caries, but I don't plan to go over 1.77, or for the time being, even over 1.4v

edit: I'm having trouble soldering on the caps to the card now Havn't done a vmod in a couple months and so I gotta catch up. Spent over an hour trying to just get one on. Can't get them to bond at all for some reason.

[zadah]

Just remember, this isn't a core voltage mod, it's a power mod and should be used only if You got the feeling your cards on-board voltage regulators can't provide enough juice/power.

But it's a good idea to try it first on a cheap spare VC, to see if the circuit actually works.

I's easy to make a mistake.
Very easy ...

There is one big problem with this mod on 6800le...and i dont recommend to use this

If you put this power supply in pareller with your 6800le, you are going to give extra stress to the cards own lower gate MOSFETS, because they are short Circuited!!!!! when using this mod.... and I think they are going to warm a lot.....

The problems is that card is using PWM regulator and that mod is using Linear regulator... and they dont work together... In PWM regulation Mosfets are switching on/off in high duty cycle and In linear regulation (LM317) transistor is on all the time.

If you want to make volt mod, you sholud replase cards mosfets to bigger ones or put similar MOSFETs paraller with the existing ones., I have tried this (because i have burnt UGATE MOSFET of my own 6800le)

[kryptobs2000]

What kind of mosfets can you put on the card in parralell? and I thought the mosfets were under the heatsink, meaning it would obstruct the heatsink if they were stacked right?

edit: Did the cap mod, used two 3300uF cause they only had 1 1000uF. Havn't tried it yet, but should work.

[firada]

That Is To Say It Will Be Supposed Flash The Bios And In The Vcore I Put 1.4v From 1.2?will Be Supposed Set Other Volt And The Vmemory?ok When You Prepare Driver You Makes The One Attached In The Forum!your Cap's That You Used Sum Of M/f Be Also Sums Of Volts Of??

[kryptobs2000]

I'm sorry but I have no idea what you said lol

That Is To Say It Will Be Supposed Flash The Bios And In The Vcore I Put 1.4v From 1.2?

I understood that, but didn't understand if your asking a question. lol, I'm sorry, I'm not making fun of you. Maybe try writing it in your native tongue, and using a translator online, or getting someone on the forum to translate, unless someone else can understand what you mean.

[kryptobs2000]

Eek! I think I fried my 6800 GT with the vmem mod.