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post #1571 of 7931
hi
i have gigabyte gtx 670 ver OC
and during loading the BIOS, pops mistake

3681224200_1347616876.png
help me frown.gif
I download the bios

http://ultrashare.net/hosting/fl/313af64253/GB670_VMOD_BP-200-250
post #1572 of 7931
Little update from mvktech:

I had a member there, saw1971, make a BIOS of my ASUS DC2O GTX680 with a max voltage of 1.27v just to see if it might work.. tongue.gif
Well, it didn't.

So, there's either a hardmod required or there are parts in the BIOS that limit the voltage. Some sort of security or w/e.

BIOS does appear stable, and strangely enough setting 1.27v in the BIOS allowed for noticably lower vdrop and 15Mhz more on the core even thought this can be completely unrelated to this change.

With 1.212v I usually got 1.207v with light / no load and 1.188v with max load.
With 1.27v in the BIOS this is 1.211v idle and 1.193-1.198v under max load.

I can now run 1215Mhz boost with 1800Mhz VRAM on my very badly binned 680.
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post #1573 of 7931
Yes a hardmod would be required to go beyond 1,21V in software (except with some custom PCBs), see a hotwire/hardmod tutorial for why this is the case.

PS: seems either temperature or power target is limiting your card, voltage should never drop below 1,21V with a modded BIOS. But voltage should also not be 1,21V in idle unless the P-States have been modified, there's something wrong.

PPS: you may eventually be able to reach a higher GPU clock by reducing the memory clock if you didn't try that yet.
Edited by Iruwen - 9/14/12 at 4:25am
post #1574 of 7931
Hi, I've got an EVGA SC Signature 2 ... Which bios fits best?
Can I use the EVGA Signature files? (cause the signature has a lower manufacturer oc than the SC Signature 2 .... does it matter?)
thx
post #1575 of 7931
Quote:
Originally Posted by Iruwen View Post

Yes a hardmod would be required to go beyond 1,21V in software (except with some custom PCBs), see a hotwire/hardmod tutorial for why this is the case.
PS: seems either temperature or power target is limiting your card, voltage should never drop below 1,21V with a modded BIOS. But voltage should also not be 1,21V in idle unless the P-States have been modified, there's something wrong.
PPS: you may eventually be able to reach a higher GPU clock by reducing the memory clock if you didn't try that yet.

Got any idea which cards / PCB's have full voltage control? I know the Lightning does have it with the LN2 BIOS and I plan to buy that however, if there's a alternative with full control to at least ~1.25v..
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Thundahcat.
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post #1576 of 7931
I know of the MSI Lightning and EVGA Classified, I read something about 1,3V iirc.
post #1577 of 7931
Quote:
Originally Posted by Imprezzion View Post

Got any idea which cards / PCB's have full voltage control? I know the Lightning does have it with the LN2 BIOS and I plan to buy that however, if there's a alternative with full control to at least ~1.25v..

I've read that you can get +600 on the memory stable? I'd be pretty happy with that since some people can't get +300 at all. Memory OCs help considerably with Kepler. Another thing to note is the VRMs are probably not being cooled that well with the DCii cooler. I had the same card and the VRM heatsink is pretty cheap. VRM cooling wouldn't stand a chance with 1.25v.

My card was stable at 1333MHz core and +350 memory on air btw on stock volts. And 1.45GHz core and +500 memory with a FC waterblock vga hotwired to 1.36v. Your memory OC is pretty darn good.
    
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post #1578 of 7931
Yeah, it's perfectly stable at 1800Mhz VRAM (+600 in MSI AB).
Any higher say ~1820Mhz and small texture glitches appear in things like BF3 / Heaven like jumpy shadows, glitching sunflares, black lines in textures asf.

VRM temps on 1.212v BIOS aren't that bad.. 68c max in BF3 on Ultra.

Then again, here in holland the Lightning costs a whopping €18 more then the DC2O so i'm selling this DC2O, maybe even with modded BIOS and all to increase selling value / speed to a more knowledged person, and i'm buying a Lightning.

The DC2O has the second disadvantage of being too big for my case and not being able to mount my HDD cage now tongue.gif
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Thundahcat.
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Maxtor 80GB IDE Cooler Master alu/copper block with a Slipstrea... Windows 98 SE Windows XP Pro SP3 
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Cooler Master Real Power M520W OEM with great airflow and even cable management 
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post #1579 of 7931
Quote:
Originally Posted by Imprezzion View Post

Little update from mvktech:
I had a member there, saw1971, make a BIOS of my ASUS DC2O GTX680 with a max voltage of 1.27v just to see if it might work.. tongue.gif
Well, it didn't.
So, there's either a hardmod required or there are parts in the BIOS that limit the voltage. Some sort of security or w/e.
BIOS does appear stable, and strangely enough setting 1.27v in the BIOS allowed for noticably lower vdrop and 15Mhz more on the core even thought this can be completely unrelated to this change.
With 1.212v I usually got 1.207v with light / no load and 1.188v with max load.
With 1.27v in the BIOS this is 1.211v idle and 1.193-1.198v under max load.
I can now run 1215Mhz boost with 1800Mhz VRAM on my very badly binned 680.

Hey, just wanted to say thanks for this info, this bios works wonders on my DCII TOP. Found it on mvktech after reading your post. They had one for TOP before, but it was boosting like crazy to 1380Mhz on my card by default, and all the vanilla bioses had wrong fan/power target settings. I just wanted a DCII OC/TOP bios with 1.2v mod (don't care about default boost clocks, as long as it's not sky-high) and this one fits perfectly. Thanks again, you da man smile.gif Just want to confirm: I read that you checked the voltage with multimeter, right? It's not 1.27v, it's 1.212, as reported in OSD? 1.27 mod didn't really work?

Edit: Also, I decided to check my VRM temps during load and it was max 78C. Does anybody know if this is acceptable temp? Never monitored VRM temps before, and google gives inconsistent answers...
Edited by DimmyK - 9/14/12 at 10:53am
post #1580 of 7931
any word on a volt and fan mod 20-100 for a galaxy gtx 670 4GB card with a 1202 boost and 1600 memory bios power board modded. and what are people using to mod there kepler bios. nibitor doesnt work for those.
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