OverclockingThe 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 1210 MHz core (13% overclock) and 1850 MHz Memory (32% overclock).
MSI HD 7970 Lightning delivers some pretty amazing additional overclocking, beyond the already overclocked stock frequencies. When compared to other HD 7900 Series cards, the overclock is much higher.
The same applies to memory overclocking, 1850 MHz is simply outstanding.
Important: Each GPU (including each GPU of the same make and model)
|Maximum Overclock Comparison|
|Max. GPU Clock||Max. Memory Clock|
|MSI HD 7970 Lightning||1210 MHz||1850 MHz|
|AMD HD 7970||1075 MHz||1715 MHz|
|AMD HD 7950||1085 MHz||1785 MHz|
|MSI HD 7950 TwinFrozr III||1020 MHz||1650 MHz|
|GeForce GTX 680||1147 MHz||1833 MHz|
will overclock slightly differently based on random production variances.
This table just serves to provide a list of typical overclocks for similar cards,
reached during TPU review.
Overclocked PerformanceUsing 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 15.7%.