AMD Radeon HD 7970 3 GB Review 301

AMD Radeon HD 7970 3 GB Review

Value & Conclusion »


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 1075 MHz core (16% overclock) and 1715 MHz Memory (25% overclock).

Both overclocks are spectacular. It's amazing to see over 15% overclocking potential on a brand-new GPU design, using a brand new production process. Over 1700 MHz memory clock is actually the highest memory speed we have ever seen!

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 14.1%.


Idle temperatures are comfortably low. Under load the card reaches a very acceptable maximum temperature that still has plenty of headroom for overclocking.

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.

GPU Voltage
Desktop300 MHz150 MHz0.85 V
Multi-Monitor350 MHz1375 MHz0.96 V
Blu-ray Playback925 MHz1375 MHz1.18 V
3D Load925 MHz1375 MHz1.16 V

CCC Overdrive Limits
Core1125 MHz
Memory1575 MHz
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