Power Consumption and Sound Levels

Even though we have been impressed with the performance of the GTX 780 Ti so far, NVIDIA didn't get this added benefit without some sacrifice.  This includes some extra power; the GTX 780 Ti is using 50 watts more power than the GTX 780 and 43 watts more than the GTX TITAN (that has twice the memory to deal with).  In fact, the power consumption comes pretty damn close to that of the R9 290X, a card we dubbed as "power hungry" in our previous review. 

Based on our SLI/CrossFire power testing, the second GTX 780 Ti uses 175 watts of power while the second R9 290X is pulling 191 watts!

This extra power draw also makes the GTX 780 Ti noticeably louder than previous reference designs from NVIDIA.  While not as loud as the R9 290X (and keep in mind we are testing the R9 290X in its "Quiet mode"), the GTX 780 Ti definitely made me notice it more than the previous GeForce flagships.  Which in this particular test, isn't a good thing.

Early on in our testing, NVIDIA informed us that to help improve performance (and consistent performance) they were going to take the full GK110 GPU and beef up its maximum thermal limit a bit.  While only a 3C delta, this no doubt allows NVIDIA to reach higher base clocks and higher typical boost clocks over the GTX TITAN even though it has an additional SMX enabled.  The R9 290X sits out there all on its own with the 95C level.

Keep in mind, in regards to power, noise and temperature, this is all a balancing act for AMD and NVIDIA.  Could NVIDIA have allowed its GPU to hit 90C, get louder and improve performance?  I think that obvious answer is yes and some consumers will choose to do that after the fact.  But AMD has made the decision for gamers and really pushed the envelope a bit to make sure they squeezed every last frame out of the Hawaii GPU as possible. 

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