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NVIDIA GTX 700 series - modified VBIOS

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Try a different program for overclocking. E.g. Nvidia inspector, I had serious issues with MSI AB.

What was your memory clock?

Everything over 215 in core and 200 in memory will crash in firestrike...

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Trying to flash your EVGA 780 - SC ACX - 80.10.3A.00.81 - 'OC edition v03' using nvflash in DOS but get a board ID mismatch (something along those lines) even with accepting with yes. Any ideas on the problem?

Here is my validation: techPowerUp GPU-Z Validation 59p4v

post-19427-14494996351966_thumb.png

Thanks.

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Yeah, you seem to have a newer GTX 780 classified, they changed some things... you can use the mod attached in this post.

Please let me know if everything's working fine with it.

I have the SC ACX not classified, which version should I use?

Thanks.

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Oh sorry, my bad. Can you send me a copy of your vbios? I don't have that version of the SC vbios.

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Thanks will try though , what issues to expect my biggest concern right now is fan speed with all non-ref BIOS it's lower. With TI should be fine I presume...

Edit: Flashed it, but cannot install video driver, any help would be appreciated

post-13633-14494996353887_thumb.jpg

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Post a screenshot of your device manager showing the VGA -> details -> hardware IDs.

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Post a screenshot of your device manager showing the VGA -> details -> hardware IDs.

There's nothing special, also checked, but only a Standard VGA driver is shown and no hardware ID's

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What if you don't use MSI AB for special voltage tweaks, but only Nvidia Inspector and overclock the regular way?

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What if you don't use MSI AB for special voltage tweaks, but only Nvidia Inspector and overclock the regular way?

Ok, I will try tomorrow and report too...

Thanks for your help..

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As I said yesterday, I tried today with nvidia inspector and the results are better. In sli I can reach (with 1,21v limitation) 1265. In single, I reach 1300 in one of the cards.

Here a firestrike in sli @ 1265 and +300 in memory:

10802190754_40795a5127_o.png

Here a firestrike in single @ 1300 core and +300 memory (1,21v limitation):

10799561613_d868fe56fc_o.png

Now waiting for an afterburner and a softmod that can unlock voltaje (at least until 1,30v) to go beyond...

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That's already pretty impressive, there are almost no Titans that can match such clocks at this voltage.

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That's already pretty impressive, there are almost no Titans that can match such clocks at this voltage.

Thanks to your bios, hahaha...

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Wow those 780 Ti scores demolish my Titans. :( Anyone want to buy a couple of pristine Titans? :D

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Public link for GTX 780 Ti added.

Can I use any other bios linked here for my new 780 sc acx or will you be creating something with the bios I gave you?

Thanks.

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I got my 780 Lightning 2 Weeks ago, with HYNIX-Memory, stable with my Original LN2 BIOS up to +800 = 3.800 (just testing stability)

Maybe I also habe GPU-Stepping B1 - i dont know

Since 2 weeks i am looking for a solution to pass PT-Limit and overclock the GPU more than 1.212v

First problem:

My Lightning does not have the VDDC-NCP4206 voltage controller, so i cant overclock with the puplished Afterburner Tweak.

Afterburner says my voltage controler is vddc-CHL8266. Now I find a way with this settings in AB:

[settings]

CaptureDefaults=0

vddc_Generic_Detection = 0

vddc_CHL8266_Detection = 46h

It works, but strange: my digital multimeter shows ma 100mv more than I put in Afterburner - ok we will see, i am gonna testing

Also I am looking for a Mod vBios and found in www only one BIOS: Skyn3t in the 780s owners forum.

I tried Sky-LN2 BIOS and have following problems:

1. By flashing I got this from nvflash:

*** WARNING: Overriding the Board ID can be very dangerous. ***

Upgrading to an image with the wrong Board ID can render the video card

unusable.

Overriding the Board ID is only needed for extreme circumstances.

A mismatched Board ID almost always means the wrong firmware image is being

used for the specific video card.

Are you sure you want to continue?

Type "YES" to confirm (all caps):

I closed my eyes an flash: ok, it works, but:

2. My Memory crashes at +300 = 3.302

3. Overclocking the GPU i habe very strong Vdrops, the voltage is varying from 1.040 to 1.450v, up an down spinning

This BIOS seems to be bad for my Lightning, i read the Sky-BIOS is build for Elpida Memory?

@svl7

May I try your 780ti BIOS or one of the others 780-BIOS?

Best wishes from Germany

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