GTX 780 Limiting OC

[S1lentThund3r]

So i've been playing around with my new GTX 780 Phantom GLH from gainward and I've gotten the core up to a nice OC of 1188 boosted, but for some reason at this point it refuses to go further. I'm using EVGA's Precision X 4.2.1 and after +105 nothing increases the max core clock that I can get.

 

The weird thing is (knowing that GPU's have now been given the power to overrule even the most expert OCer) GPU Boost 2.0 should not be holding back to my mind. With fans @ 100% I'm not anywhere near its thermal limit and the card was overvolted to the highest that nVidia dares give us (lest we break our toy and come crying to them). Most reviewers have got theirs higher than this, and they stopped due to instability not the darn thing ignoring me.

 

Any thoughts as to why its not going any higher chaps?

[WoodenMarker]

Bad chip?

[AMICLG]

My guess is the oc software/drivers or a bad chip. 

[S1lentThund3r]

Well when we say bad chip, its a chip that wont OC as far, it works just fine at stock overclock.

[S1lentThund3r]

Seems that it was being limited by voltage. I've upped by +63mV and +105 now means a 1.228ghz overclock. Guess it makes a certain amount of sense. Just wish that software would not make all the decisions for me. But its still not letting me go past +105. Guess that the 780 has soo much potential that is wasted by nVidia refusal to let bios's go past 106% power levels. So disappointing. 

[Rekx]

Just wish that software would not make all the decisions for me.

 

I dont think things work that way Sometimes you just get a bad card. Therefore software wouldn't be able to predict that, atlest not easy.

 

 

 

 But its still not letting me go past +105. Guess that the 780 has soo much potential that is wasted by nVidia refusal to let bios's go past 106% power levels. So disappointing. 

 

Buy AMD then

[S1lentThund3r]

I dont think things work that way Sometimes you just get a bad card. Therefore software wouldn't be able to predict that, atlest not easy.

 

 

Buy AMD then

This 780 was replacing my 7870XT (The baby 7950) so I am comming from AMD to this, but my last one didnt overclock very well.

[Rekx]

This 780 was replacing my 7870XT (The baby 7950) so I am comming from AMD to this, but my last one didnt overclock very well.

 

So how is the tranformation? from AMD to Nvidia guy

[S1lentThund3r]

Its been mostly smooth, in many respects I havent noticed the difference apart from the horsepower grunt increase, which would have happened either way. I reckon my screen is taring more on my new card, but that could be happening for a variety of other factors, and the fact that it is quieter is just because I spent a bit more on a card with quiet cooling (which most of them are these days anyway)

[S1lentThund3r]

Geforce experience has been crashing, I dont stream or capture gameplay so shadowplay is useless and I am yet to see the difference PhysX makes (bearing in mind I ran it off the CPU in most games anyway). So really the only positive for me was the price, getting a darn good 780 for the price of a cheap 290 (Got it for $600 australian which is about $500 U.S after rates and the Aussie Tax).

[Face2Face]

You really need to push the voltage and unlock the power limit. I would recommend flashing your bios with the Skyn3t bios and using the Afterburner hack to get to 1.3v. It's an 8 phase card so it should be able to handle 1.25-1.3v as long as your temps are ok.

 

 

That name brings back some memories  :wub:

 

[S1lentThund3r]

I had considered doing the bios switch, but this card doesn't have dual Bios's so I've decided that the bit of extra overclocking headroom given by those bios's just aren't worth the risk of bricking a brand new (and expensive) GPU.

 

I don't suppose the AB hack will work without the new bios will it?