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

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post #1 of 458
Thread Starter 
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

Edited by Zawarudo - 9/8/13 at 5:49pm
post #2 of 458
363sj.gif


rolleyes.gif

biggrin.gif


thumb.gif




Keep pushin!
Edited by Jared Pace - 8/23/13 at 4:08pm
post #3 of 458
Thread Starter 
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
Edited by Zawarudo - 8/23/13 at 5:40pm
post #4 of 458
Great job, I'm pushing 1.325v now and it holds it pretty stable.
    
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i7 4770k Gigabyte Z87X OC  Gigabyte GTX Titan Gskill Ripjaws 2400mhz 16GB 4x4GB  
Hard DriveHard DriveCoolingCooling
Corsair Force GS 240GB Western Digital Velociraptor 320GB EK GTX Titan Acetal Copper FC Block with Backplate EK Monarch DIMM Module heatspreaders 
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post #5 of 458
Thread Starter 
Quote:
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
post #6 of 458
Nice work, were you able to hold a higher clock?
post #7 of 458
Quote:
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
post #8 of 458
Thread Starter 
Quote:
Originally Posted by Jared Pace View Post

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
Edited by Zawarudo - 8/23/13 at 4:50pm
post #9 of 458
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
Edited by Jared Pace - 8/23/13 at 4:40pm
post #10 of 458
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.
    
CPUMotherboardGraphicsRAM
i7 4770k Gigabyte Z87X OC  Gigabyte GTX Titan Gskill Ripjaws 2400mhz 16GB 4x4GB  
Hard DriveHard DriveCoolingCooling
Corsair Force GS 240GB Western Digital Velociraptor 320GB EK GTX Titan Acetal Copper FC Block with Backplate EK Monarch DIMM Module heatspreaders 
CoolingCoolingCoolingOS
EK X3 Reservoir 150 EK Gigabyte Z87 X OC Acetal Copper Block EK Monarch X4 Copper Acetal Block with clean top Windows 8 64-Bit 
MonitorMonitorMonitorKeyboard
Dell U2412M Dell U2412M Dell U2412M Razer BlackWidow 
PowerCaseMouseMouse Pad
Corsair AX1200i Custome Acetal case CNC Machined from 8mm sheet  Razer Mamba Razer Ironclad 
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Corsair Individually Sleeved Cables Koolance 90deg Elbows  Monsoon Compression Fittings Corsair SP120 Quiet Edition PWM Fans 
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Koolance OD3 Quick Disconnect Male Compression Koolance OD3 Quick Disconnect Female G1/4 Threaded EK Acetal Clean Supremacy Block XSPC RX360 Radiator 
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CPUMotherboardGraphicsRAM
i7 4770k Gigabyte Z87X OC  Gigabyte GTX Titan Gskill Ripjaws 2400mhz 16GB 4x4GB  
Hard DriveHard DriveCoolingCooling
Corsair Force GS 240GB Western Digital Velociraptor 320GB EK GTX Titan Acetal Copper FC Block with Backplate EK Monarch DIMM Module heatspreaders 
CoolingCoolingCoolingOS
EK X3 Reservoir 150 EK Gigabyte Z87 X OC Acetal Copper Block EK Monarch X4 Copper Acetal Block with clean top Windows 8 64-Bit 
MonitorMonitorMonitorKeyboard
Dell U2412M Dell U2412M Dell U2412M Razer BlackWidow 
PowerCaseMouseMouse Pad
Corsair AX1200i Custome Acetal case CNC Machined from 8mm sheet  Razer Mamba Razer Ironclad 
OtherOtherOtherOther
Corsair Individually Sleeved Cables Koolance 90deg Elbows  Monsoon Compression Fittings Corsair SP120 Quiet Edition PWM Fans 
OtherOtherOtherOther
Koolance OD3 Quick Disconnect Male Compression Koolance OD3 Quick Disconnect Female G1/4 Threaded EK Acetal Clean Supremacy Block XSPC RX360 Radiator 
OtherOtherOther
XSPC Acrylic Tank Reservior/Pump Top XSPC RX360 Radiator  Koolance 450S D5 Pump 
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