We checked out the overclocking potential of our sample of the Gigabyte card at its default voltage of 1.175 volts and maximum Power Limit. The cooler worked in the automatic regulation mode. We managed to increase the base GPU clock rate by 65 MHz to 1120 MHz.
The resulting frequencies were 1202/1267/7328 MHz:
The GPU frequency is quite normal for a GeForce GTX 680. We couldn’t get anything more by switching to the extreme BIOS or increasing GPU voltage. The memory frequency is high, though.
The GPU temperature of the overclocked card increased by 3°C to 71°C while its fans accelerated by 150 RPM to reach 7410 RPM.
Winding up this review, we want to say a few words about Gigabyte's OC Guru II utility which can help you monitor and control all the parameters of your GeForce GTX 680 SOC WindForce 5X.
Besides monitoring and adjusting frequencies and voltages, the utility lets you fine-tune PWM frequency and other power system parameters:
There is a screen where you can set up the behavior of the fans depending on temperature or choose one of three presets:
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 (three runs of the Metro 2033: The Last Refuge benchmark at 2560x1440 with maximum image quality settings, but without antialiasing).
Here are the results:
Interestingly, the configuration with the Gigabyte card was somewhat more economical in terms of power consumption than the system with a similar card from ASUS. Even when the Gigabyte GeForce GTX 680 SOC WindForce 5X is overclocked to 1202/7320 MHz, it draws less power than the ASUS GeForce GTX 680 DirectCU II TOP at its default 1137/6008 MHz.
We can also note that the system with Radeon HD 7970 GHz Edition (in Sapphire’s version) is more power-hungry than both systems with GeForce GTX 680s while the configuration with the dual-processor GeForce GTX 680 needs the most power. In 2D mode every system consumes about the same amount of power.