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.
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) |
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Desktop | 100 MHz | 150 MHz | 0.90 V |
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Blu-ray Playback | 800 MHz | 1000 MHz | 1.15 V |
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3D Load | 800 MHz | 1000 MHz | 1.15 V |
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CCC Overdrive Limits |
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Core | 900 MHz |
Memory | 1150 MHz |