Stability Problems Overclocking GTX 680M

[ponx]

Please help...

 

I am trying to give my trusty M17xR4 a new lease of life and have flashed the unlocked vBIOS from svl7 (thanks, btw!) 80.04.33.00.32__'OCedition'_revised_00.

 

Trouble is, I can only overclock by about +160MHz before the video drivers crash while running 3DMarkFS, and I lose video completely in FarCry4 - I can't get anywhere near the +405MHz NVidia Inspector now offers..!! (The temps are fine, so that is not the problem: getting 62-65C under load)

 

Forgive me, but I'm no expert with regards to overclocking... To get stability with higher frequencies do I need to increase voltage..?  Strangely, the voltage tweaking options are greyed out for me in Nvidia Inspector. Or do I need to try one of those over-volted vBIOS images instead..?

 

Thanks.

 

[Zoldago]

It's possible that your card can't get over the +160MHz.

It depends on the "ASIC-Quality" of your card. You can find some videos on YouTube about ASIC-Quality.

[Khenglish]

With the 680m the voltage slider does not work in Nvidia inspector. You need to flash an overvolted vBIOS.

 

ASIC quality has no impact on overclocking other than power consumption. Low ASIC quality = higher power consumption.

[ponx]

Thanks for the feedback.  svl7 produced 3 overvolted vBIOSes in addition to the standard one I've been using; when I have time I will try them out and report back...

 

[ponx]

I flashed the vBIOS that gives 1.025V and that improved stability at slightly higher clock speeds. Not massively higher though, so I'll keep experimenting...

 

[Ganny X]

the best thing to do with 860m with OC ... just dont burn it up like I did lol (first r1)