GTX 680 to 770 unlocking?

[Shmee]

I remember hearing rumors about this being possible, so my two questions are:

1. Is it possible to flash a 680 to a 770?

and 2. Does this make any significant difference and any sense?

Obviously the 770s on google shopping I could find were quite a bit cheaper than the 680s, so this wouldn't make sense for new buyers, but what about those who already own 680s?

 

[Jaydip]

I believe if you already have a good clocker like the lightning,DC II you have little reason to do this.As for the success I have heard mixed stories.

 

[3DVagabond]

Are the 770's voltage unlocked?

 

[Jaydip]

Probably yes except few special models.

 

[blackened23]

Some 680 owners have done it but the problem is, most 680s don't have VRAM that can handle the higher clockspeeds that the 770 has. I've heard of some lightning 680 owners flashing to 770s since their VRAM apparently didn't have issues (the 680 lightning I owned also had no issue with 7ghz VRAM speeds), but most reference 680s struggle to reach 7ghz speeds for the VRAM. So that will be the biggest stumbling block, even if the higher core clocks work...

Basically the 770 BIOS overclocks the 680 to higher speeds and uses boost 2.0. There really isn't any reason to flash to a 770 from a 680 from a performance standpoint - generally speaking, a 680 and 770 at similar clockspeeds will be within 1-2% of each other. GPU Boost 2.0 has some optimizations but the main speed differences stem from the higher VRAM and core clock speeds compared to the 680; those higher VRAM/core speeds are also the main deterrent preventing most 680s from being flashed to a 770. Some can handle it, many can't. It's really not worth bothering with TBH even if your card can handle the higher speeds.

 

[3DVagabond]

Probably yes except few special models.

What? So, are they, or aren't they? Some? All? All except some?

 

[Jaydip]

What? So, are they, or aren't they? Some? All? All except some?

They are locked but some models may have unlocked voltage(this part I am not so sure about)

 

[felang]

http://forums.guru3d.com/showthread.php?t=379680

 

[Shmee]

Thanks for the link. Looks like it is hit or miss, and still a very new and evolving science.

 

[UaVaj]

very well said blackened23.

not flashing any of my 680 trisli.

 

[felang]

Thanks for the link. Looks like it is hit or miss, and still a very new and evolving science.

Yeah, seems to me that it´s not really worth the hassle right now. That and one of my 680´s is an especially bad overclocker anyway, so I doubt it could handle 770 clocks. Also it appears that flashing cards for SLI use is even more unstable.