Overclocking

The overclocks listed in this section were achieved with the default fan and voltage settings as defined in the VGA BIOS. Please note that every single sample overclocks differently, that's why our results here can only serve as a guideline for what you can expect from your card.



Maximum stable clocks of our card are 1115 MHz core (1% overclock) and 1435 MHz Memory (15% overclock).

Overclocking isn't working that well on Gigabyte's HD 7770 OC. In other HD 7770 reviews we've seen typical GPU clocks of 1150 to 1170 MHz and memory went up to 1600 MHz.

Overclocked Performance

Using these clock frequencies we ran a quick test of Call of Duty 4 to evaluate the gains from overclocking.


Actual 3D performance gained from overclocking is 5.2%.

Temperatures

Temperatures are low across the board, everything good here.

Clock Profiles

Modern graphics cards have several clock profiles that are selected to balance power draw and performance requirements.
The following table lists the clock settings for important performance scenarios and the GPU voltage that we measured. We measure on the pins of a coil or capacitor near the GPU voltage regulator.