OverclockingTo 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.
The overclocks of our card are 915 MHz core (4% overclock) and 1445 MHz Memory (5% overclock). Both overclocks are less than impressive, especially from the memory chips I expected more which are specified to run at up to 1500 MHz.
Overclocked PerformanceUsing these clock frequencies we ran a quick test of Call of Duty 4 to evaluate the gains from overclocking.
The actual 3D performance gained from overclocking is 4.2%.
Temperatures seem to be well optimized. A little higher idle temperature for less idle fan noise would be something I'd prefer, but overall the temperature looks good.
Voltage TuningAt this time there is no way to adjust the voltage of these cards. The voltage controller itself supports I2C, so it is only a question of time until willing users can adjust their GPU voltage.
Clock ProfilesModern 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.
|Desktop||250 MHz||150 MHz||0.90 V|
|Blu-ray Playback||500 MHz||1375 MHz||1.00 V|
|3D Load||880 MHz||1375 MHz||1.05 V|
|CCC Overdrive Limits|