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[AnandTech] NVIDIA GeForce GTX 780 Overclocking Results

post #1 of 60
Thread Starter 
Quote:
So while GTX 780 can’t necessarily clock any higher than GTX Titan, the additional TDP headroom means that it’s more likely to reach its higher boost bins more often, making overclocking more effective. Amplifying all of this is the fact that at stock GTX 780 is more often temperature limited than it is TDP limited, amplifying the factor we have the greatest control over (the temperature throttle) and minimizing the factor we have the least control over (the TDP limit).
Quote:
Wrapping things up, when it comes to overclocking the GTX 780 we’re looking at a 17% average performance improvement for a 55W increase in at-the-wall power consumption and 6.3dB increase in noise. This is enough to not only equalize GTX 780 and GTX Titan, but is enough to push GTX 780 ahead by 6% in all of our benchmarks at 2560. Whether it’s worth it is ultimately an individual decision, but in general this is a fairly reasonable tradeoff, especially if the additional noise isn’t a great concern.

SOURCE
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loon 3.2
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post #2 of 60
Good results.

Pity they didn't do it OC 780 vs OC Titan though
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post #3 of 60
woot nice overclocking result. I have to say they are really good at adjusting the card's price according to its performance.
post #4 of 60
Why overclock but not change default fan profiles. Run it at 80% fans and OC as much as you can to truly see OC'ing potential. At 84C hasn't it already downclocked twice?
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post #5 of 60
Quote:
Originally Posted by Nous View Post

woot nice overclocking result. I have to say they are really good at adjusting the card's price according to its performance.

Agreed. They need to change their prices before I ever decide to pay that much for a graphics card.
post #6 of 60
I thought with gpu boost 2.0 you could set your own temperature thresholds and could therefore eliminate that as a limiting factor almost entirely?
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post #7 of 60
Seriously anandtech thumbsdownsmileyanim.gif What a lame oc.
post #8 of 60
Thread Starter 
Quote:
Originally Posted by crappy View Post

I thought with gpu boost 2.0 you could set your own temperature thresholds and could therefore eliminate that as a limiting factor almost entirely?
Quote:
Practically, GPU Boost 2.0 is different only in that Nvidia is now speeding up its clock rate based on an 80-degree thermal target, rather than a power ceiling. That means you should see higher frequencies and voltages, up to 80 degrees, and within the fan profile you’re willing to tolerate (setting a higher fan speed pushes temperatures lower, yielding more benefit from GPU Boost). It still reacts within roughly 100 ms, so there’s plenty of room for Nvidia to make this feature more responsive in future implementations.
GPU Boost 2.0 And Troubleshooting Overclocking
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post #9 of 60
Quote:
So while GTX 780 can’t necessarily clock any higher than GTX Titan, the additional TDP headroom means that it’s more likely to reach its higher boost bins more often, making overclocking more effective. Amplifying all of this is the fact that at stock GTX 780 is more often temperature limited than it is TDP limited,

At least anand knows how these cards work.

The quote above also tells you why OC titan vs. OC 780 reviews can't give you accurate results when it comes to proper OCing that most OCNers do.
 
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post #10 of 60
Quote:
Originally Posted by looniam View Post

*Toms hardware nonsense*
Quote:
While the guaranteed boost clocks aren’t too far apart, the so-called Boost-curve set by Nvidia has been unlocked to a much greater degree; you can now adjust the temperature target upwards to allow the card to boost to higher frequencies more regularly and the same goes for its power target and core voltage. There’s still a behind-the-scenes algorithm ensuring you don’t melt the card into a crusty pile of circuits and silicon, but some of the much-maligned safety mechanisms in place with the GTX 680 2GB have been removed. The end result is particularly exciting for water-cooling, as Nvidia tells us the card should clock higher the cooler it runs.
Titan review
Edited by crappy - 5/28/13 at 8:06am
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