KGB - Kepler BIOS Editor/Unlocker

[war4peace]

Hello,

I have re-flashed my card BIOS and I started getting "Display driver nvlddmkm stopped responding and has successfully recovered." errors in every game.
My card is a Gigabyte GTX660Ti (link) and I have downoaded its BIOS wit GPU-Z, used KGB to unlock it and set minimum fan speed to 10% (it's all I care about) and used nvflash to upload the new BIOS. The minimum fan speed is indeed at 10% now, but I can no longer play any game properly.
- GTA4 blanks out and recovers but the FPS is reduced to 15-17, I have to exit the game and go back in.
- Warframe pops out of the game and sends me to a generic webpage about Hardware failure detected.
- World of Tanks shows a white screen, I have to close it and re-run the .exe when that happens, it does not recover by itself.

My Display Driver version is 314.22.

Any ideas? What should I do to make this go away?

[kevindd992002]

Did you try reflashing back to the original BIOS and see if it fixes the prob?

[war4peace]

Apparently it does. I have played Warframe more than 1h without a glitch after reflashing to original BIOS. Previously, I couldn't play for more than 15 minutes.

[kevindd992002]

Apparently it does. I have played Warframe more than 1h without a glitch after reflashing to original BIOS. Previously, I couldn't play for more than 15 minutes.

Well, did you increase the voltage also? Unlocking (increasing) the voltage will also increase your boost clock.

[NEOAethyr]

I assume this doesn't support an nvidia vgx grid k2, not a biggy though.

I uploaded my bios'es, they are stock, not modded.
From the batches before the power limits, the 680 lightning.

http://hidemyass.com/files/KQbfg/

Pain in the butt to find a working file upload site these days :\.

Anyways I hard modded my card into a grid k2, well half of one, I need a 2nd 680 lightning to complete it.
Decisions decisions...

[jumper2high]

@CrazyNuts: Could you take a look at the output from this post and see what's the reason for it failing? Is the DCII ROM not supported yet?

[war4peace]

Well, did you increase the voltage also? Unlocking (increasing) the voltage will also increase your boost clock.

Hmm, to be honest I haven't touched that area. What happens if I comment all entries in the Voltage area in the CFG file? All I need is reduced minimum fan speed %.

[kevindd992002]

Hmm, to be honest I haven't touched that area. What happens if I comment all entries in the Voltage area in the CFG file? All I need is reduced minimum fan speed %.

Hmmm, that's weird then. Commenting all voltages in the CFG file means you won't touch the voltage at all when you flash the modified BIOS over.

[kevindd992002]

Got it. But what I don't understand is what would be the disadvantage if you keep Preserve_Original_Checksum to 1 all the time even when modding non-UEFI BIOS? Is there some disadvantage when recalculating the checksum by using the original value?

CrazyNutz, please reply. Are you still busy?

[MikjoA]

Hey, can somesone give me his eVGA GTX 660 Ti SuperClocked 2Gb bios please ?
I have an eVGA GTX 660 Ti standart and such an upgrade would be nice, if it is stable I could consider unlock it then.

And unfortunately I can't download CrazyNutz GTX 660 Ti SC bios links are broken... and there' no GTX 660 Ti SC 2gb bios in techpowerup database.

[melodystyle2003]

Hello.

I receive my evga gtx660 sc and tried to unlock via this great kgb tool.
I get a message for bad checksum, different value its time.

C:\kgb 660stock.rom

Kepler Golden BIOS Tool (Beta v0.6.2) by CrazyNutz @ XtremeSystems
WARNING: Use at your own risk!

BIOS start found 0600

BIOS end found 1820b

Checksum: Bad (In ROM: 00  Calculated: 90)

Oh no, Bad checksum.


C:\kgb 660stock.rom

Kepler Golden BIOS Tool (Beta v0.6.2) by CrazyNutz @ XtremeSystems
WARNING: Use at your own risk!

BIOS start found 0600

BIOS end found 1820b

Checksum: Bad (In ROM: 00  Calculated: 4d)

Oh no, Bad checksum.


C:\kgb 660stock.rom

Kepler Golden BIOS Tool (Beta v0.6.2) by CrazyNutz @ XtremeSystems
WARNING: Use at your own risk!

BIOS start found 0600

BIOS end found 1820b

Checksum: Bad (In ROM: 00  Calculated: 07)

Oh no, Bad checksum.

My bios is this. Is it possible to support this bios too?

Thank you.

Edit:
I run cmd as admin, set kgb.exe in compatibility mode for xp sp3 with admin rights and manage to unlock it!

C:\kgb 660stock.rom

Kepler Golden BIOS Tool (Beta v0.6.2) by CrazyNutz @ XtremeSystems
WARNING: Use at your own risk!

BIOS start found 0600

BIOS end found f5ff

Checksum: Good! cf

Model: GTX 660  Device ID: 11C0

Found power offsets 832f

Found fan offsets 83a9

Found voltage offsets 7649

Found max boost offsets 6f75

Fan Speed Range: Min = 30  Max = 100

Power:
   Power Target:       125000
   Max Power Target:   200000 (160%)

Max Boost:
   1280.5 Mhz

Voltage Table:
   1212500
   1212500
   12125000

   1212500
   1212500
   12125000

[NamelessTed]

Hey CrazyNutz,

First off, good work so far on this utility. I manager to unlock the BIOS quickly and got it flashed. My card is already boosting past what was stable previously.

The issue I am running into might not be fixable from a BIOS standpoint, it might just be built in to Kepler through some other means. When I first launch a game or benchmark I can see the card boosting to 1202MHz with a vcore of the 1.212. But, once the card hits 70C it starts to throttle it down. If I let Heaven benchmark loop for a while it balances out with the core clock at 1123.5MHz, temp at 75C, 54% fan speed, and 1.2000 V.

Is 75C considered that hot for a kepler GPU? Do you think there is some way to make the card not throttle at these temperatures? I remember reading something about how the Boost on the Titan's worked differently to allow higher temps. I am pretty tired right now so I don't have as much time to play with it as I had hoped. I am planning on testing with the fan speeds, I believe you can make custom fan curves in Afterburner so I will play around with how loud that gets and seeing if it helps the temps at all.

[harinoorvirk28]

hi so i just modded my bios and i started seeing way lower scores than i had before why is this? and how can i go back to my old bios i did create a back
up for that plz help asap

[CrimInalA]

Hey guys, I'll look into adding 650ti support. It's probably the same as gtx660 since its a gk106 gpu.

I see no mention of the 650ti in the startpost of this thread . Does that mean its not supported yet ?
Any idea if it ever will or if its even possible ?

[CrimInalA]

you can download my original PNY GTX 650 Ti bios here : http://www.skybed.be/temp/xtremesyst...inal.GK106.rar

[Hypertek]

I would also like to see 650 TI support here, I have a 650 ti 2gb (non-boost) , got it water cooled (it was a cheap replacement for my 8800gt) . Thanks!

When I run kgb, it finds the card, but at the bottom says "hmm, could not find power offsets"

[gpvecchi]

I have latest 680 Lightning unlocked bios, I tried this tool, but it lowers voltage table and power limit. I suggest to leave it untouched if values are higher.
I'd even like to use a newer bios, but they are all locked; it would be nice if I could choose limits to use...

[Boulard83]

I have latest 680 Lightning unlocked bios, I tried this tool, but it lowers voltage table and power limit. I suggest to leave it untouched if values are higher.
I'd even like to use a newer bios, but they are all locked; it would be nice if I could choose limits to use...

If you GPU bios is already unlocked, why you want to unlocked something already unlocked ?

[webtourist]

I have two cards in SLI. It is very difficult to separate them .
Do I have to unlock them one by one?

[sepol]

I have two cards in SLI. It is very difficult to separate them .
Do I have to unlock them one by one?

No, nvflash flash them bought. It search by all the cards in the system.

[webtourist]

No, nvflash flash them bought. It search by all the cards in the system.

Thanks Sepol.
I did that. Everything is OK.
Thanks CrazyNutz . Nice job!