We checked out the overclocking potential of our GeForce GTX 780 using EVGA Precision X version 4.2.0. The Power and Temperature Targets were set at their maximums:
For the temperature not to interfere with our overclocking experiments, we set the fan at 75% speed, which was about 3200 RPM. With such cooling, the GPU temperature was no higher than 71°C, even though at a very high level of noise.
After all that we managed to increase the graphics card’s frequencies to 1018/1057/7168 MHz.
The overclocked GPU would work at 1150 MHz in our tests.
We guess it's a rather good, even though not record-breaking, result for a reference GeForce GTX 780 without any modifications.
We measured the power consumption of our testbed equipped with different graphics cards using a multifunctional Zalman ZM-MFC3 panel which can report how much power a computer (without the monitor) draws from a wall outlet. There were two test modes: 2D (editing documents in Microsoft Word or web surfing) and 3D. In the latter case the load was created by four runs of the introductory “Swamp” scene in Crysis 3 game at 2560x1440 with maximum image quality settings, but without MSAA.
The power consumption of the GeForce GTX 780 configuration is compared with configurations that include an ASUS GeForce GTX 680 DirectCU II TOP (at the standard GTX 680 clock rates) and a reference NVIDIA GeForce GTX Titan.
The GeForce GTX 780 needs more power compared to its predecessor. Its configuration consumes 74 watts more than the GTX 680 configuration. When the GTX 780 is overclocked, its configuration is almost comparable to the GeForce GTX Titan one in terms of power draw. The difference from the Radeon HD 7970 GHz Edition isn’t large at only 18 watts under peak load.