OverclockingTo find the maximum overclock of our card we used a combination of GPUTool and our benchmarking suite.
The overclocks listed here 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 803 MHz core (6% overclock) and 1035 MHz Memory (9% overclock). Breaking 800 MHz with GF100 GPU is a good result on air, our first sample, using the reference cooler managed only 770 MHz. According to ZOTAC a special binning process is in place that selects only well-overclocking GPUs.
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 9.7%.
Idle temperatures are comfortably low, a lower fan speed in trade for higher temperatures would have helped with the idle noise. Under load the card is running roughly 20°C cooler than the NVIDIA reference design!
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||50 MHz||68 MHz||0.99 V|
|Blu-Ray Playback||405 MHz||162 MHz||0.99 V|
|3D Load||756 MHz||950 MHz||1.10 V|