AMD Radeon HD 6670 1 GB Review 35

AMD Radeon HD 6670 1 GB Review

Value & Conclusion »

Overclocking

To find the maximum overclock of our card we used a combination of GPUTool and our benchmarking suite.
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.



Overclocks of our card are 980 MHz core (23% overclock) and 1270 MHz Memory (27% overclock). Both overclocks are nice, especially the GDDR5 memory with its high-clock potential can help a lot.

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 21.0%.

Temperatures


Temperatures are low in all tests, given the fan noise I think a better choice would have been a few °C more under load and less fan noise.

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 major performance scenarios and the GPU voltage that we measured. We measure on the pins of a coil or capacitor near the GPU voltage regulator.

Core
Clock
Memory
Clock
GPU Voltage
(measured)
Desktop100 MHz150 MHz0.90 V
Blu-ray Playback800 MHz1000 MHz1.15 V
3D Load800 MHz1000 MHz1.15 V

CCC Overdrive Limits
Core900 MHz
Memory1150 MHz
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