GTX780/Titan (any NCP4206 card) vdroop fix - solid 1.325v - Overclock.net - An Overclocking Community

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GTX780/Titan (any NCP4206 card) vdroop fix - solid 1.325v

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post #1 of 464 (permalink) Old 08-23-2013, 03:43 PM - Thread Starter
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GTX780/Titan (any NCP4206 card) vdroop fix - solid 1.325v

After reading about people having the same issue
as me with the softmod I took it upon myself to fix the issue
& probably annoy GPU vendors the world over.


The mods below assume you are using a custom bios, for more information please see
Official GTX780 Owners club & Official Titan Owners club
Using a voltage over the specified manufacturer's setting will probably decrease
the life of your card and without proper cooling will more than likely fry the VRMs. That said;

Use this at YOUR OWN RISK!




Ok so here's the skinny of it with some explanation:
First, Softmod Afterburner (Click to show)
Basically you want to first do the softmod which is widely available in different threads = softmod @ skyn3t

It's exactly the same for 780s as it is Titans
Mod background, worth reading (Click to show)

The chip supports /r commands which request specific info from the chip.
The chip also supports /w commands which send specific commands to the chip.

So when people are doing the basic softmod they are writing this:

MSIAfterburner /ri3,20,99 (or ri4; depends on the card)

From what I have gathered the /ri3,20 is basically a request info from 3,20 followed by the command number; 99.
99 in this case is the command for requesting the chips ID. hence why some people get a invalid return when they try /ri4

Alright so with that out the way onto the good bit:

See this thread for the tool to do it with little effort.

Proof (Click to show)
Skyn3t's 440PT GTX780 BIOS! (Click to show)

Be aware this bios is for people running above 1.25v all the way to extreme benching.
Use it at your own risk because you will push your card hard using this.


Nvidia GTX 780 ACX
Version 80.10.3A.00.80
It can be used in any dual or triple fan GPU cooler.
Base core clock 1137.Mhz
Disabled boost
3d voltage adjustable
1.212v unlocked
Fan Idle 20%
Fan bumped to 100%
Default power target 440W

nvflash1.3.4+440PT vBios-by-skyn3t.rom.zip 534k .zip file




Big thanks to:
skyn3t for his epic bios and support
y2kcamaross for the SLI information
and to everyone else egging me on haha

-=]░▒▓███ [Official] NVIDIA GTX 780 Owner's Club ███▓▒░[=-
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post #2 of 464 (permalink) Old 08-23-2013, 03:46 PM
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363sj.gif


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Keep pushin!
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post #3 of 464 (permalink) Old 08-23-2013, 04:24 PM - Thread Starter
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Never going to happen, they are comfortable up to 1.6v apparently.
Spec sheets =/= real world scenarios. I was wrong.

Any feed-back, questions? Come one guys don't be shy

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post #4 of 464 (permalink) Old 08-23-2013, 04:26 PM
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Great job, I'm pushing 1.325v now and it holds it pretty stable.

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post #5 of 464 (permalink) Old 08-23-2013, 04:29 PM - Thread Starter
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Originally Posted by thestache View Post

Great job, I'm pushing 1.325v now and it holds it pretty stable.

You'll find that you get ever so slightly fluctuations in vcore when you are near the power limit, sometimes when you aren't but it's just like how a CPU operates it's only like .01v~ We need a BIOS with 400% Power limit.

Skyn3t? thumb.gif

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post #6 of 464 (permalink) Old 08-23-2013, 04:30 PM
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Nice work, were you able to hold a higher clock?
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post #7 of 464 (permalink) Old 08-23-2013, 04:32 PM
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Originally Posted by Zawarudo View Post

they are comfortable up to 1.6v apparently.

Comfortable in that datasheet, but not @ 150C in your dusty computer case tongue.gif
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post #8 of 464 (permalink) Old 08-23-2013, 04:32 PM - Thread Starter
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Nice work, were you able to hold a higher clock?

Yup, I can sit at the power limit all day long at around 1350MHz~ (fluctuating because of power limit) with a bios with a higher limit we could see nearly all GTX780s and probably Titans hitting 1400MHz



I don't do dust tongue.gif

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post #9 of 464 (permalink) Old 08-23-2013, 04:35 PM
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Isn't there a 170% or 200% CE bios floating around in the titan thread... Naenon or V3 or Engineering or something...




Now you just need an IR gun, or figure out how to probe the VRM for polling a temp OUT reading. Look at the VID table for 1325mv and try the next step up... Then considering your available headroom on the vrm..... Consult your infos.....

and....

Keep pushin!

BTW I don't see this ending well. tongue.gif
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post #10 of 464 (permalink) Old 08-23-2013, 04:38 PM
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Quote:
Originally Posted by Jared Pace View Post

Isn't there a 170% or 200% CE bios floating around in the titan thread... Naenon or V3 or Engineering or something...

Yeah that's what I'm using, the engineering BIOS. PM me for the link if you can't find it.

I pulled 349w with it. Be careful though I've just had a strange hard crash with mine and my card was just giving me a blank screen for a few restarts.

Was pushing 1.325v 1333mhz core and 3746mhz on the memory stable in Valley.

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