As the GTX Titan is using NVIDIA's new GPU Boost 2.0 technology, temperature rose fairly quickly in each test, but was accompanied by a similar increase in core clock speeds. After hitting the threshold of 80 degrees Celsius, the temperature seemed to hold steady without any noticeable fan speed increases. The fan itself operates quietly until set to about 70% of its maximum operational level where it gets noticeably louder.
On another note, if GPU Boost 2.0 is active with all new NVIDIA graphics cards moving forward, temperature testing could become a moot point since the GPU would be eager to overclock itself to its best levels and maintain the default temperature threshold of 80 degrees Celsius.
The GTX Titan showed quite high power consumption, on par with AMD's Radeon HD 7970 GHz Edition. In fact, at load it drew only 7% less power than the dual-GPU GTX 690 which was quite alarming for a single GPU card. While it may seem unsettling when compared against the NVIDIA camp of cards, it's still in positive light when compared to the AMD camp of cards.
One thing to note is that the Titan is likely operating at its best potential turbo clock speeds under the 80 degrees threshold, which means it will likely consume more power than usual. This is especially true when you consider that other than the Titan, none in the comparison operates in the same manner, thus making it seem more power hungry than expected when it was actually designed to push the boundaries.