OverclockingThe overclocking results 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, which is why our results here can only serve as a guideline for what you can expect from your card.
We used the Boost BIOS for our testing, which runs increased voltage compared to the normal BIOS.
The maximum stable clocks of our card are 1275 MHz core (6% overclock) and 1885 MHz memory (18% overclock).
|Maximum Overclock Comparison|
|Max. GPU Clock||Max. Memory Clock|
|Sapphire HD 7970 Toxic||1275 MHz||1885 MHz|
|Gigabyte HD 7970 Super OC||1155 MHz||1905 MHz|
|HD 7970 GHz Edition||1185 MHz||1635 MHz|
|MSI HD 7970 Lightning||1210 MHz||1850 MHz|
|AMD HD 7970||1075 MHz||1715 MHz|
Important: Each GPU (including each GPU of the same make and model)
will overclock slightly differently based on random production variances.
This table just serves to provide a list of typical overclocks for similar cards,
determined during TPU review.
Overclocked PerformanceUsing these clock frequencies, we ran a quick test of Battlefield 3 to evaluate the gains from overclocking.
Actual 3D performance gained from overclocking is 10.6%.