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Why no voltage control?? Gtx670

Because nvidia have said you are not allowed to alter it, basically.

The rules given to board partners are:

-Max core voltage 1.175v
-No software voltage control
-board and cooler design must be sufficient for overclocking if marketed as such. (or something like that).

Evga tried to get around it by making the classified require evbot to provide hardware overclocking, because evga brown-nose nvidia (blower coolers etc). MSI pretty much ignored it. Apparently they were both nvidiaslapped and told to stop issuing bioses that allowed overvolting. I recall a guru3d article that said msi may have been threatened with the possibility of not being able to buy gpus from nvidia if they didn't change.
Asus have something with the RIVE iirc but not heard anything, kfa2 have a custom voltage controller on the ltd oc but heard nothing..

However, the new 680 lightning bioses still allow overvolting. Heard nothing since then.

IMO it's either of these(speculation):
-They want to cut down on damaged gpus/rmas
-They aren't confident of the safety of gpu boost algorithm, as it drives the boost voltage
-They are aware of degradation beyond 1.175v
 
OptimaLnrg said:
Because nvidia have said you are not allowed to alter it, basically.

The rules given to board partners are:

-Max core voltage 1.175v
-No software voltage control
-board and cooler design must be sufficient for overclocking if marketed as such. (or something like that).

Evga tried to get around it by making the classified require evbot to provide hardware overclocking, because evga brown-nose nvidia (blower coolers etc). MSI pretty much ignored it. Apparently they were both nvidiaslapped and told to stop issuing bioses that allowed overvolting. I recall a guru3d article that said msi may have been threatened with the possibility of not being able to buy gpus from nvidia if they didn't change.
Asus have something with the RIVE iirc but not heard anything, kfa2 have a custom voltage controller on the ltd oc but heard nothing..

However, the new 680 lightning bioses still allow overvolting. Heard nothing since then.

IMO it's either of these(speculation):
-They want to cut down on damaged gpus/rmas
-They aren't confident of the safety of gpu boost algorithm, as it drives the boost voltage
-They are aware of degradation beyond 1.175v
Click to expand...

Is there an article on that somewhere?

It really stinks, lets hope they don't start pushing this to the point where all brands are forced to lock them up tight, A couple of 100mv can't make much difference, surly.
 
humbug said:
Is there an article on that somewhere?

It really stinks, lets hope they don't start pushing this to the point where all brands are forced to lock them up tight, A couple of 100mv can't make much difference, surly.
Click to expand...


http://www.guru3d.com/article/msi-gtx-680-lightning-voltage-tweaking/

The requirements for TDP/cooling and no software voltage control were posted by an evga rep on their forums when he was slating 'other manufacturers' (msi) for breaking the rules and saying evga have stuck to them (or so they thought). Post was later pulled.
 
Well it certainly ramps up and down as the GPUs come under load and then back down again.

I ran Heaven windowed with GPUZ and EVGA precision running

K4RRS.jpg
 
~TB~ said:
Well it certainly ramps up and down as the GPUs come under load and then back down again.

I ran Heaven windowed with GPUZ and EVGA precision running

K4RRS.jpg
Click to expand...
Yeah won't let you go over the 1.175mV limit, that's the maximum mine goes, it's abit boring not being able to play with voltages.
 
Speedy Pete said:
Do the 680's suffer from this problem also?
Click to expand...

All 6x0 series with gpu boost (keplar)
Minus a few cards (msi power edition / hawk / lightning, evga classified (via an external tool costs ~£100), possibly galaxy hall of fame (kfa2 ltd o/c) providing they release software to do it, possibly asus dcuii via something on the RIVE mobo? (not sure).

I think a lot of them had plans to get around the rules but then nvidia shouted at them, because it's all gone quiet on the voltage front.

It's not a 'problem' in the sense of some defect or malfunction. It's by nvidia design/stipulation/request/rule.
 
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Nvidia wouldn't lock the voltage down for no reason, voltage above 1.175 has I assume been experimented with by nvidia and can degrade the gpu. these gk107 chips are midrange and over clocked like hell by nvidia to make them look high range, at stock they are already being pushed hard.
 
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