We checked out the overclocking potential of our GeForce GTX Titan using the EVGA Precision X utility at the maximum power and temperature targets:
To ensure better cooling, we removed the side panel of our computer case and set the speed of the Titan’s fan at its maximum 4000 RPM.
After several hours of such testing we managed to increase the base GPU clock rate by 135 MHz and the memory frequency by 1300 MHz.
The resulting clock rates were 972/1011/7308 MHz.
We had to eventually reduce the graphics memory frequency by 40 MHz (to 7268 MHz), however, for further testing. The GPU frequency of the overclocked card would peak to 1137 MHz occasionally, but always dropped to 1071 MHz at high loads.
As you can see, the GPU felt quite comfortable for a GK110 under our conditions, its temperature never exceeding 64°C. Our attempt to overclock it at a voltage of 1.187 volts wasn’t successful, so we stopped at the clock rates mentioned above.
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 (four runs of the introductory scene in Crysis 3 game at 2560x1440 with maximum image quality settings, but without MSAA). Our tests showed that the ne game is more load-intensive than the previously used Metro 2033: The Last Refuge that is why we chose to replace it.
For comparison purposes hereinafter we also added the results for Nvidia GeForce GTX 690, ASUS GeForce GTX 680 DirectCU II TOP (at reference frequencies) and HIS 7970 IceQ X2 GHz Edition 3 GB. Let’ see what we got:
When the GeForce GTX Titan works at its default clock rates, the corresponding system needs 55 to 60 watts more than the system with ASUS GeForce GTX 680 and 44 to 45 watts more than the system with HIS Radeon HD 7970. When the Titan is overclocked, the power consumption grows up by 25 watts to 547 watts, which isn’t much for a configuration with a hi-end graphics card. In fact, this is 50 watts less than required by the system with a dual-processor Nvidia GeForce GTX 690. So, there’re no surprises here.
The configurations are all comparable to each other in terms of their idle power draw.