KGB - Kepler BIOS Editor/Unlocker

[Scorpion49]

I signed up here for this thread, thanks for the great work! I appear to have an unsupported OEM 660, the KGB output is good but the actual limits on the card remain the same even after flashing.

I used:
Max boost freq 1202
Max voltage 1.212
Max power target 150%

What I get:
Max boost freq 1110
Max voltage 1.115
Max power target 145%

The power target actually changed from 145% to 150% in afterburner after I flashed it, but the card will not go there.

[kevindd992002]

@CrazyNutz

Is there any way to modify the default power target instead of the max power target? So that we don't need to manually turn up the power limit slider in software OC?

[CrazyNutz]

So I flashed my cards and set the voltage to 1.20v, but I get artifacts even doing it at the same level overclock I got before the flash. So my question is, is there such a thing as too much voltage for the GTX670? I am water cooling and temps have not gone above 46c. According to GPUz I get 1.21v max when benching, so I am wondering if I need to lower the voltage in the CFG file to the default 1.18v. I was hoping the added voltage would allow me to hit 1254Mhz on the GPU, but if it is going to cause artifacts then there is no point. By the way, this is easy as pie to do, love the program still, thank you for all the effort CrazyNutz.

I had problems with my card set over "1187500" too. This is why I set the default KGB.cfg to Voltage = 1187500

If you think about it setting it at 1187500 allows it to stay "in harmony" with the boost function i.e. where the boost will move the voltage up 2 levels ultimately hitting 1.21. If its set over 1187500 then some kind of error may be occurring (just a guess).

[kevindd992002]

@CrazyNutz

Any answer to my question?

[Utnorris]

I had problems with my card set over "1187500" too. This is why I set the default KGB.cfg to Voltage = 1187500

If you think about it setting it at 1187500 allows it to stay "in harmony" with the boost function i.e. where the boost will move the voltage up 2 levels ultimately hitting 1.21. If its set over 1187500 then some kind of error may be occurring (just a guess).

I went back and reflashed with the default voltage set at 1.18 and got the same results. In fact the voltage still boosted to 1.21v. This was after flashing back to the original bios, so I am not sure what is up with it. It's not that big of a deal, I still get 1241 and 1202 out my two cards with the default bios, just wanted to see if I could squeeze a little more out of it.

[aressto]

Kepler Bios Editor 1.1 is same as KGB but with GUI?

[aressto]

im trying to turn off manufactory OC couse my card getting "video driver restarted" when runing good powered games (BF3 at ultra as example).
(there is no guarante left)

default is:
frq 1110.50
1176.0
mem 1502

default power 200
max powe 225

Power Limit Low 260
Power Limit High 280
-------
When i soft down
Base clock offset -50
in Nvidia Inspector, it works without problem

so i thought i need to lower frq in bios to
1060
1126 and flash it. And i did it.

Now i have this settings set in
GPU clock / Default clock in Nvidia Inspector

but Current Clock
still at
1110
and Est.Max:1176 and i get restarts.

How to change this settings?
is it Power Limit Low/High?

[aressto]

solved via another tweaker

[najiro]

Hello guys. I've been following this thread for some time now. Really want to unlock my bios. This is the first time I'd be doing this so I'm kinda worried about all this. Anyway, I just unlocked the bios but not haven't flashed it yet. I think I am missing something. Is the voltage table correct? I am using an ASUS GTX 660 DCU II



Update:
I was trying to flash it but THIS came out. I can't flash it. How do I enable that?

[holystarlight]

try in CMD "Nvflash --protectoff" then try again with the flash. to enable it again do "Nvflash --protecton"

[najiro]

try in CMD "Nvflash --protectoff" then try again with the flash. to enable it again do "Nvflash --protecton"

YEEEEY!! it worked! thanks ^_^
was scared doing the entire thing. will post 3dmark 11 scores later! thanks guys! thanks for this mod crazynutz

[Tripp17]

I know ur a busy guy, i can respect that. My question is again about the the 690. If i extract the bios using gpu-z im almost positive you only get it for GPU 0 and not both 0 and 1. If i used nvflash i can get them both for sure but i was wondering if i sent you my bios (any way yo want it, nvflash or GPU-Z) could you mod it? I dont wanna screw up a 1k card. Any time or help would be greatly appreciated!

[LedHed]

Tripp17, in GPU-Z at the bottom you can select each GPU separately can't you?

I remember when I had a GTX 295 it would show two 295's and it was each GPU being displayed separately.

[kevindd992002]

@Cryptik

Do you know the hex offset values for boost frequency and memory frequency for the gigabyte gtx 670 wf3 oc card? I want to edit my vBIOS with a hex editor to avoid using software OC.

[bentez2003]

My second card (lowest, temps never go above 55c) Seems to heavily throttle the higher the GPU usage for it is. I can't believe its a temp issue as it is doing it from boot using stock or modified bios. In less demanding games the clock and volts stay at 1359 & 1.212v but if I use 3dmark11 or Heaven with vsynce off the clock bounces about as much as 300mhz and the volts track it. I have the power target set to 225w

I think the card is bouncing between P0/P2 & P5 states, can I change the P5 state clock without causing issues?

[LedHed]

bentez what you are describing makes perfect sense when you read the Whitepaper on Kepler about Boost:

When determining the thermal design power (TDP) limit of our GPUs, NVIDIA engineers monitor the GPU's power consumption while running a wide range of real-world 3D applications in a worst-case thermal environment. We then set the GPU's clock speeds based on these results.

Under real world conditions running today's latest games, however, most GPUs will never approach their TDP; power consumption varies from one application to another, and most users don't run their GPUs under worst-case environmental conditions.

In cases where the GPU isn't fully taxed, it would be beneficial if the GPU could increase its clock frequency to deliver improved 3D performance and/or higher image quality with richer graphics effects enabled. This is where NVIDIA's GPU Boost technology comes in.

A combination of hardware and software technology that works with the GeForce GTX 680, GPU Boost works in the background, dynamically adjusting the GPU's graphics clock speed automatically, based on GPU operating conditions. Dedicated hardware circuitry continually monitors GPU power consumption. GPU Boost automatically adjusts clocks to achieve the maximum possible clock speed while remaining within a predefined power target.

GPU Boost operates completely autonomously with no game profiles and no intervention required by the end user, providing an instant performance boost to gamers.
GeForce GTX 680's base 3D frequency is 1006MHz, which is called the Base Clock. This is the minimum 3D frequency the GPU is guaranteed to achieve running under load in TDP apps (strenuous real-world applications that push power utilization to the Thermal Design Power limits of a GPU).

The Boost Clock is the average clock frequency the GPU will run under load in many typical non-TDP apps that require less GPU power consumption. On average, the typical Boost Clock provided by GPU Boost in GeForce GTX 680 is 1058MHz, an improvement of just over 5%. The Boost Clock is a typical clock level achieved while running a typical game in a typical environment.
However, in many cases the GPU will have additional power headroom available and will automatically increase the Boost Clock even higher than 1058MHz. As long as the GPU remains under its power target, GPU Boost will seamlessly increase the GPU Clock: clock speeds of 1.1GHz or higher have been observed internally in testing various non-TDP apps.

GPU Boost is fully compatible with GPU overclocking. Using third-party overclocking utilities provided by NVIDIA board partners, GeForce GTX 680 users can adjust the GPU's power target to enable higher clock speeds. Once the power target has been increased, the GPU can be overclocked by raising the GPU clock offset. As you can see in the screenshot below, some GeForce GTX 680 cards are able to scale to much higher clock speeds:

It sounds like you are exceeding the 150% power target.

At 1359mhz that is not surprising.



The new Titan GPU allows you to set the power target it seems:

[bentez2003]

Thanks for your reply Ledhead, I should have said I've had this card for about 4-5 months now and it only started this behavior after I unlocked it to use 1.212v. it was fine at a constant 1359mhz in all programs for a couple of weeks after unlocking, now im having throttling issues.

When I first used KGB it unlocked the max power target to 236250mw (150%). Isn't this over the 225w max for a 670 using two 6 pin power cables? Could this have caused damage? I discovered this using the Kepler bios tweaker v1.24. I have tried all manner of things to get a more stable core clock like flashing a stock bios from ASUS, lowering max clocks and voltages, forcing base clock to 1359mhz but I find the same results. I now thinking of tweaking the P5 state to 1359 to see if that makes a difference. I guess I need to try the card on its own to make sure this isn't an SLI issue.

[LedHed]

CrazyNutz I gave you a "shout out" in our article: http://videocardz.com/39677/nvidia-g...ncement-leaked

[kevindd992002]

@ledHed

What is the Titan GPU?

[aussie-revhead]

Google it mate, its $1000+ of pure gpu power.

[LedHed]

@ledHed

What is the Titan GPU?

Here is Titan: http://videocardz.com/39721/nvidia-g...titan-released

[CrazyNutz]

CrazyNutz I gave you a "shout out" in our article: http://videocardz.com/39677/nvidia-g...ncement-leaked

Thanks Led!

If someone could get me a titan bios I can get a head start on adding support to KGB

[kevindd992002]

@CrazyNutz

When can you approximately have time in implementing the memory clock and boost clock modification feature?

[Mungri]

Hmmm, ok I have a small issue with my new GTX 680.

- I dont want to unlock the voltage after having two 670s die.
- The card runs fine at 1.175v @ 1254 Mhz and high fan speed to keep it under 70 degrees (but this is too loud).
- But when it reaches 70 degrees, the voltage throttles to 1.16v and causes the 1254 Mhz clock to crash.

Has anyone figured out a way to get rid of the annoying throttles at 70 and 80 / 85 degrees yet?

[kevindd992002]

Regarding your two 670s dying on you, are you sure that the unlocked voltages were the cause?